Skylink WT-433 Window/Door Sensor

• Protects doors, windows, and other entrances
• Sends a signal to Control Panel or Dialer when contact is broken
• Add on as many magnetic contacts (MS-001) as needed
• Covers range up to 100 feet
• Compatible with Skylink Security System and Emergency Dialer

Extra Door / Window Sensor… SAVE! Protects entrances and sends a signal to the control panel or dialer when contact is broke. Up to 100′ range. Measures 3 3/8 x 1 1/2 x 1 1/8″ and weighs 2 3/5 ozs. Order ONLINE Today! AVAILABLE SEPARATELY: Skylink Complete Wireless Alarm System and Smoke / Carbon Monoxide or Extra Motion Sensors – word search in our Store for ‘Sensors’ and ‘Alarm System’. Extra Door / Window SensorWhen used in conjunction with a compatible Skylink Security System and Emergency Dialer, the Skylink WT-433 Window/Door Sensor provides a high level of protection for your home or office. This compact unit helps ensure that doors, windows, and other entrances are secure. Easy to install and operate, the WT-433 allows you to augment your current Skylink system without the need for wires or monitoring fees.

The Skylink WT-433 Window/Door Sensor: Offers fast, easy installation Utilizes Advanced Rolling Code Technology Features a 100-foot operating range Works with the Emergency Dialer, Control Panel, and Audio Alarm (not included) Does not require expensive, monthly monitoring fees

The wireless WT-433 sensor is easy for anyone to install.

Provides Protection Against Intruders or Theft
When used with your Skylink security system and emergency dialer, the WT-433 gives you an additional layer of protection against break-ins. Place this sensor near doors, windows, or other entrances to ensure that they remain secure. With its 100-foot operating range, the WT-433 gives you the peace of mind that locks or bolts simply can’t match.

Easy-to-Install Unit Works with Skylink’s Home-Security Systems
As part of Skylink’s innovative home security system, the WT-433 requires no professional installation, registration with alarm companies, or expensive fees. You can install the unit yourself in just a few minutes to enjoy expanded protection in your home or office. This accessory is especially ideal for those who want to extend a current system to include all windows and doors.

Flashing Red Light Ensures the Security of Windows and Doors
The WT-433 works by sending a signal to the control panel or emergency dial whenever contact is broken, i.e. when an entrance or window is opened while the alarm is engaged. A red light on the sensor flashes when the alarm is triggered, which is helpful when you want to be sure that a door or window is fully closed.

Compact, Lightweight Design Blends With Any Decor
Compact and lightweight, the WT-433 measures approximately 1.5 x 3.4 x 1.2 inches (WxHxD) and weighs just 2.5 ounces, which means it won’t take up much space or detract from your decor. It also allows you to add as many magnetic contacts (product #MS-001, not included) as needed to keep the unit secure.

Compatibility and Battery Information
The WT-433 works with Emergency Dialer AD-433S, Control Panel SC-001, and Audio Alarm AA-433, and it runs on one 12-volt alkaline battery (included).

What’s in the Box
Sensor, one 12-volt battery, and instruction manual.

This window/door sensor works with your existing Skylink system to keep your home or business secure.

Rating: (out of 12 reviews)

List Price: $ 25.95

Price: $ 18.00

Driveway Patrol Sensor and Receiver Kit

• Sends alert when people, vehicles enter driveway or approach mailbox
• Wireless; motion-activated; weather-resistant; 400-foot range
• Sensor installs with screw on any surface: door, post, garage
• Portable receiver has three settings: high or low chimes and ôoffö
• Operates on one 9-volt and three C-cell batteries (which are not included)

Amazon.com Review When a visitor–wanted or unwanted–approaches a house on foot or in a vehicle the motion-detecting sensor unit of this warning device sends a signal to the receiver indoors, which chimes an alert. The device is wireless and has a 400-foot range. It requires three C-cell batteries for the receiver and one 9-volt battery for the transmitting sensor. (Batteries are not included.) The sensor is housed in weather-resistant plastic, installs with a screw on any surface, such as a mailbox post, garage, or door, and measures 4-1/4 inches high, 2-5/8 inches wide, and 2-1/4 inches deep. The portable receiver has an identical housing, can be set to chime high or low (or turned off), and measures 5 inches high, 3-5/8 inches wide, and 1-1/2 inches deep. –Fred Brack Product Description Wireless Driveway Patrol alerts you the moment someone enters your property. SAVE BIG! As seen on TV! With the Driveway Patrol, you’ll always have advanced notice that someone’s on their way to your door. Compact, discreet motion-sensor unit installs on garage, mailbox, fencepost… nearly anywhere. And when triggered, it sends a wireless signal to the receiver unit, up to 400 feet away! When the unit’s adjustable chime tells you you’re about to have a visitor, you can prepare accordingly. Installs in minutes, no tools needed; Completely wireless; Alerts you to visitors, trespassers, deliveries and more; Sensor is extremely weather resistant. 3 5/8 x 1 1/2 x 5″h. Receiver uses 3 C batteries, 2 5/8 x 2 1/4 x 4 1/4″h. Sensor takes one 9V (not included). 2 lbs.; Order yours now! Driveway PatrolWhen a visitor–wanted or unwanted–approaches a house on foot or in a vehicle the motion-detecting sensor unit of this warning device sends a signal to the receiver indoors, which chimes an alert. The device is wireless and has a 400-foot range. It requires three C-cell batteries for the receiver and one 9-volt battery for the transmitting sensor. (Batteries are not included.) The sensor is housed in weather-resistant plastic, installs with a screw on any surface, such as a mailbox post, garage, or door, and measures 4-1/4 inches high, 2-5/8 inches wide, and 2-1/4 inches deep. The portable receiver has an identical housing, can be set to chime high or low (or turned off), and measures 5 inches high, 3-5/8 inches wide, and 1-1/2 inches deep. –Fred Brack

Rating: (out of 248 reviews)

List Price: $ 39.99

Price: $ 9.99

GE 45131 Choice-Alert Wireless Door/Window Sensor
price: $13.99

• Indicates when a door, window or gate has been opened indoors or outdoors
• Operates up to 150-Feet away
• Easy Installation – secure with screws or double sided tape
• Weather resistant
• Low Battery Notification

GE 45131 Choice-Alert Wireless Door/Window Sensor
Product Description
GE WIRELESS ALARM SYSTEMAmazon.com Product Description
The weather-resistant GE 45131 Choice Alert Wireless Door/Window Sensor provides a layer of security for any door or window inside or outside your home, including gates, cabinets, refrigerators, sheds, and more. Its two-piece magnetic design is easy to install and requires no wiring. The sensor transmits a wireless alert to the Choice Alert Wireless Control Center whenever a door or window is opened or closed. An added bonus, the sensor is powered by a single lithium battery that provides up to 24 months of protection before it needs to be replaced.

The GE 45131 Window/Door Sensor Provides: Security for any door or window; quickly installs without wires Transmission of wireless signals within a range of 150 feet Weather-resistance for indoor or outdoor use An innovative 2-piece magnetic device that alerts you when a window or door is opened

Choice Alert components offer expandability for complete home protection.

A weather-resistant, wireless design lets you intall this sensor on any door or window. View larger.

Note: This product must be used with the GE 45129 Wireless Control Center or with the GE 45142 Wireless Control Center Starter Kit (each sold separately). The GE 45131 Window/Door Sensor can work alongside other wireless Choice Alert components as part of a GE Choice Alert Wireless Alarm System.

Part of the GE Choice Alert Wireless Alarm System
The GE 45131 Window/Door Sensor is part of the GE Choice Alert Wireless Alarm System line of products. Cost-effective and easy to install, Choice Alert components offer wireless operation, multi-zone coverage, home and away settings, all-weather function, and expandability for complete home protection.

With wireless capabilities, Choice Alert products require no complicated wiring, drilling or expensive installation costs. And because they are designed to be part of a self-contained system, there are no monthly usage charges. System components are simple enough for anyone to use, and can be combined to provide a customized blanket of protection over your entire property.

Wireless Control Center for Sensor Monitoring
The entire Choice Alert Security System is designed around the Wireless Control Center, the system’s hub. The Control Center monitors each and every sensor that is wirelessly connected to it. As many as four sensors can be programmed in each of four zones, giving you the security of up to 16 sensors to guard your entire home, including sensors for doors, windows, gates, water leaks, and motion detection.

The Wireless Control Center allows you to secure your system with a custom four-digit code that can be changed at any time. Plus, the center lets you control many system features. For example, you can select ‘Home’ mode for an instant alarm and ‘Away’ mode for a delayed alarm. In addition to the armed alarm system, the Control Center also offers a visible and audible Zone Notification alert system (with a choice of continuous alert or single chime mode) and a dedicated alert zone (Zone 4). The center wirelessly transmits and receives signals up to 150 feet.

Additionally, the Wireless Control Center features a low-battery indicator that will alert you when battery power is low in a specific zone, so you’ll know exactly when to replace the batteries in every one of your components.

Combine Components for Total Home Coverage
To complement the Window/Door Sensor, there are several components available for use with the Wireless Control Center, including a water leak sensor, a motion detector, a secondary audio alarm siren, a signal repeater (for enhanced wireless range), a garage door sensor, and a Silent Alert LED indicator. Add up to 16 sensors and give yourself the peace of mind that only complete home protection can provide.

All-Weather Security that Installs Within Minutes
Installing the GE 45131 Window/Door Sensor couldn’t be any easier. Using the included double-sided tape or screws and mounting plate, you can install the sensor on almost any door (interior or exterior), gate, or window within minutes. There’s no wiring involved–the sensor wirelessly transmits alerts to the Choice Alert Wireless Control Center within a range of 150 feet.

The Choice Alert Window/Door Sensor can be paired with any of the Wireless Control Center’s four zones in just a matter of seconds. Zones One through Three provide alarm protection, while Zone Four is a dedicated alert zone that generates a visual alert along with a continuous beeping alert to discreetly warn you that the zone has been compromised.

The GE Choice Alert Window/Door Sensor is backed by a one-year limited warranty.

What’s in the Box
GE 45131 Window/Door Sensor with magnetic contact, two screws, two screw caps, two plastic anchors, mounting plate, and two double-sided pieces of tape.
GE 45131 Choice-Alert Wireless Door/Window Sensor
Disclaimer: Paid affiliate site of Amazon.com

by The Library of Congress

Home Security Sensor Basics

In this day and age, it is very easy to get caught up in the gadgetry of home security systems.  From simple motion detectors to the more sophisticated video cameras and biometric systems, the advancements of technology has certainly made it both easy and difficult to protect yourself, your loved ones and all you value in your home. 

Technology has made it easier in terms of providing different levels of protection and access.  But the plethora of choices available sometimes makes choosing the right home security system a bit daunting.  This is where hiring a reputable home security company can help.

If the homeowner has a basic idea of what he is looking for, the better he will be able to explain his needs to the home security company that is installing the system.  If the homeowner’s security needs and budget do not seem to match the security system choice, a reputable home security company will offer advice and some options.

Although there are a lot of do-it-yourself home security kits available in the market, it is advisable for those who are serious about protecting their home and loved ones to hire professionals. 

Home security companies are well worth the expense.  Can you put a price on your peace of mind?  Can you put a price on the safety of your loved ones?  Hiring a reputable home security company ensures the proper installation of your home security system.  Don’t do it yourself unless you are a licensed expert at installing home security systems yourself.

So here’s a little bit of help for those who are intimidated by the wide array of home security choices.  Treat this as a basic guide to helping the harried and hurried homeowner make a faster decision on his home security needs.

Perimeter sensors indicate when a window or door has been breached.  Indoor sensors such as mats strategically placed under windows, let the homeowner know if there has been a break-in.  Another type of indoor sensor detects motion such as a burglar entering a house through a window.  Ask your home security expert for details about perimeter and indoor sensors.

Ultrasonic sensors are more sophisticated than the simple motion detectors.  These sensors send out sound waves to detect movement in or around the house.  Your home security expert will know if this is the right choice for your home given the layout of your house and the relative location of windows and air vents.

If the ultrasonic sensors won’t work in your home, an alternative might be a microwave sensor.  Instead of sending out sound waves, these sensors send out microwave radio waves which are unaffected by air currents.  If not installed properly, this type of home security system can be triggered by movement around the corner of the home.  It is best to have a home security installation expert install a microwave sensor to avoid the hassles and fines of false alarms.

More sophisticated security systems are the photo-electric sensor and the passive infrared sensor.  The photo-electric sensor is a light sensor that triggers an alarm when blocked.  The passive infrared sensor is a more intelligent version of the motion detector.  Ask your home security professional for details.

Now consider yourself equipped with the basic knowledge about home security system options for your home.  Your home security professional will be able to guide you to the right security system given your security desires, the size of your home, and your budget.

Skylink PS-434A Motion Sensor
price: $19.95

• Protects your home by detecting movement inside your house
• Monitors your front lawn, back yard or driveway
• Motion detecting range of 40 feet with a 110-degree arc
• Easy to set up with ball-joint mounting kit
• 9-volt alkaline battery included

Skylink PS-434A Motion Sensor
Product Description
Extra Motion Sensor… SAVE! Uses infrared technology to monitor areas up to 40′ by an arc of 110-deg. On / test mode. Up to 100′ range. Measures 4 1/2 x 2 1/2 x 2″ and weighs 6 ozs. Order ONLINE Today! AVAILABLE SEPARATELY: Skylink Complete Wireless Alarm System and Smoke / Carbon Monoxide or Extra Door / Window Sensors – word search in our Store for ‘Sensors’ and ‘Alarm System’. Extra Motion Sensor
Skylink PS-434A Motion Sensor
Disclaimer: Paid affiliate site of Amazon.com

GE 45132 Choice-Alert Wireless Motion Sensor Alarm System
price: $16.98

• Detects motion inside or outside your home using LED motion notification
• Adjustable motion detection angle
• High/low sensitivity selection; up to 40-Feet
• Easy to set up, easy to use
• Create your own alarm system

GE 45132 Choice-Alert Wireless Motion Sensor Alarm System
Product Description
GE 45132 WIRELESS ALARM SYSTEM MOTION SENSOREASY TO SET UP & EASY TO USE;LED MOTION NOTIFICATION;ADD UP TO 16 SENSORS TO A CONTROL CENTER; OPERATES UP TO 150 FT;REQUIRES JAS45129 WIRELESS ALARM SYSTEM CONTROL CENTERAmazon.com Product Description
The weather-resistant GE 45132 Choice Alert Wireless Motion Sensor detects movement within a 110-degree area from up to 40 feet away. Great for monitoring activity in and around your home, such as in the garage, backyard, hallways, shed, living room, or entry area, the Motion Sensor is easy to install anywhere with no drilling required. And with wireless operation, the sensor is powered by a single nine-volt battery (not included) that will last up to nine months.

The GE 45132 Choice Alert Motion Sensor: Functions indoors or out Installs in minutes without wires Provides 110-degree coverage with a 40-foot range Communicates with the Wireless Control Center from up to 150 feet away

A weather-resistant, wireless design lets you intall the Choice Alert motion sensor anywhere. View larger.

Note: This sensor must be used with the GE 45129 Wireless Control Center or with the GE 45142 Wireless Control Center Starter Kit (each sold separately). The GE 45132 Motion Sensor can work alongside other wireless Choice Alert components as part of a GE Choice Alert Wireless Alarm System.

Part of the GE Choice Alert Wireless Alarm System
The GE 45132 Motion Sensor is part of the GE Choice Alert Wireless Alarm System line of products. Cost-effective and easy to install, Choice Alert components offer wireless operation, multi-zone coverage, home and away settings, all-weather function, and expandability for complete home protection.

With wireless capabilities, Choice Alert products require no complicated wiring, drilling or expensive installation costs. And because they are designed to be part of a self-contained system, there are no monthly usage charges. System components are simple enough for anyone to use, and can be combined to provide a customized blanket of protection over your entire property.

Wireless Control Center for Sensor Monitoring
The entire Choice Alert Security System is designed around the Wireless Control Center, the system’s hub. The Control Center monitors each and every sensor that is wirelessly connected to it. As many as four sensors can be programmed in each of four zones, giving you the security of up to 16 sensors to guard your entire home, including sensors for doors, windows, gates, water leaks, and motion detection.

The Wireless Control Center allows you to secure your system with a custom four-digit code that can be changed at any time. Plus, the center lets you control many system features. For example, you can select ‘Home’ mode for an instant alarm and ‘Away’ mode for a delayed alarm. In addition to the armed alarm system, the Control Center also offers a visible and audible Zone Notification alert system (with a choice of continuous alert or single chime mode) and a dedicated alert zone (Zone 4). The center wirelessly transmits and receives signals up to 150 feet.

Additionally, the Wireless Control Center features a low-battery indicator that will alert you when battery power is low in a specific zone, so you’ll know exactly when to replace the batteries in every one of your components.

Combine Components for Total Home Coverage
To complement the Motion Sensor, there are several components available for use with the Wireless Control Center, including a door/window sensor, a water leak detector, a secondary audio alarm siren, a signal repeater (for enhanced wireless range), a garage door sensor, and a Silent Alert LED indicator. Add up to 16 sensors and give yourself the peace of mind that only complete home protection can provide.

All-Weather Motion Sensor Installs Anywhere
The versatile GE 45132 Choice Alert Motion Sensor can be installed anywhere, inside or out. Its weather-resistant design allows the sensor to function in most climate conditions, and its ball-joint head swivels to allow ample coverage. The sensor covers a wide, 110-degree area at a range of up to 40 feet, so it’s ideal for living rooms, dining rooms, hallways, garages or backyards. And, the 45132 can be mounted up to 150 feet away from the Wireless Control Center (not included). It needs no wiring or electricity for operation, running off a single nine-volt battery (not included).

The Choice Alert Motion Sensor works with any of the Wireless Control Center’s four zones. When the Motion Sensor is paired with Zones One, Two, or Three, the Wireless Control Center will emit a loud alarm that lets you know motion has been detected in ‘Away’ mode only. The Motion Sensor will not activate an alarm in ‘Home’ mode, so you can move freely around the house when the system is armed. Alternatively, when the Motion Sensor is paired with Zone Four (the dedicated alert zone) on the Wireless Control Center, a continuous alert will notify you of motion in a specific area.

The GE 45132 Choice Alert Motion Sensor is backed by a one-year limited warranty.

What’s in the Box
GE 45132 Motion Sensor with mounting bracket, two screws, two plastic anchors, and ball-head joint.
GE 45132 Choice-Alert Wireless Motion Sensor Alarm System
Disclaimer: Paid affiliate site of Amazon.com

Additional Voice Alert Wireless Sensor Transmitter
price: Too low to display

• Extra Sensor for the Voice Alert System
• System can support up to 6 sensors
• All Weather, Wireless PIR Sensor Transmitters
• Multiple Beam Patterns for Optimal Detection
• Adjustable Mounting, Beam Sensitivity, and Delay Timer

Additional Voice Alert Wireless Sensor Transmitter
Product Description
Wireless Sensor Transmitter.
Additional Voice Alert Wireless Sensor Transmitter
Disclaimer: Paid affiliate site of Amazon.com

Wireless Motion Sensor Alarm and Chime Kit
price: $26.49

• 2 in 1 Motion Sensor Alarm and Chime
• Piercng Alarm For Security or Pleasant Chime for Home or Business
• No Installation Required
• Wall Mountable
• 2 Pack Inlcudes 2 Motion Sensor Alarm and Chime with 4 Remotes

Wireless Motion Sensor Alarm and Chime Kit
Product Description
U.S. Patrol is a state-of-the-art wireless alarm system kit for homes and businesses. It is user-friendly easy to use protecting homes/businesses at a minimum cost of investment. No installation required and self-monitoring alarm system without monthly fees is a key benefit for users. The system is motion sensored and alerts you with a piercing alarm for security or acts as a pleasant door chime for your home or business. Includes 2 easy on/off remotes and each measures 5 x 4 Wall Mountable. Motion Sensor alarm and chime requires 4 AA Batteries each (not included) and each remote requires 3 AG13 Button Cell Batteries (included). Get piece of mind with our 2 in 1 affordable Motion Sensor Alarm and Chime Kit. Great for doors, garages, sheds and more. 2 Pack includes 2 Motion Sensor and Chime Pads with 4 Remotes.
Wireless Motion Sensor Alarm and Chime Kit
Disclaimer: Paid affiliate site of Amazon.com

SecurityMan SM80 Wireless PIR Motion Sensor for AirAlarm Home Security System (White)

• Add-on wireless motion sensor for SecurityMan Air-Alarm system
• Wireless Transmitting distance: ¿450ft (in open area)
• Operating power: 9V alkaline battery
• Battery service life: ¿ 2 years
• Detecting distance: 100° 10×10m

SM-80 is an add-on wireless PIR motion sensor for SecurityMan Air-Alarm system. Its wireless transmitting distance is up to 450ft (in open area). It includes a 9V alkaline battery which could last up to 2 years. Motion detection range is 100° 10×10m.

Rating: (out of 2 reviews)

List Price: $ 24.99

Price: Too low to display

Home Security Made Easy – The Ultimate Home Security Guide! A+ (104 Pages)

Most US residents worry about leaving their home unprotected while they work or travel. And if they live in “bad” neighborhoods where crime is frequent, they may even have trouble sleeping. Unfortunately, leaving fear is not that unusual today. Elderly people living alone and latch-key kids at home alone after school are vulnerable and less able to protect themselves. Fear may even drive people to keep guns in their home, introducing the risk of being injured or killed by your own weapon.

No matter how unrealistic our fears may be, they are based on real events. The daily news is evidence of the danger of becoming a victim of crime, and the proliferation of crime-oriented television shows created even more concern. Let’s face it. People are becoming more cautious these days, and well they should.

Even in sparsely-populated areas, people are locking their doors and windows. Children are taught not to open the door to strangers. Dead bolts and chain locks are top sellers. When families leave town for a few days, they stop mail deliveries and ask neighbors to keep an eye out for them. Whole neighborhoods cooperate to establish Neighborhood Watch programs. And many households are equipped with home security devices.

Modern burglars, vandals, and other intruders are smart. They don’t enter just any home. They watch and wait for the right opportunity to relieve you of your possessions or deface your property. They do their homework, identifying easy entry points, observing family schedules, and always planning alternative ways to make a fast buck.

Locking your doors and windows just doesn’t cut it anymore. Unless your home was constructed using hard, heavy-duty lumber, massive doors, thick unbreakable glass, and double-secure installation, windows and doors might as well as open portals to the experienced intruders. Even those extra-secure features will only serve to slow a burglar down. They may prevent break-ins if your intruder as to make a lot of noise to get in. But is it worth the risk?

Criminals pay attention to home security systems too. They know how to disable to avoid them. But a house that’s well-equipped with a reliable home security system that combines alarms, motion detectors, and video monitoring is a good, dependable deterrent.

The truth is that even the best home security systems are not enough alone. Households that contain a lot of valuables, whether they’re expensive items or precious family heirlooms with sentimental value, need extra security measures to be secure. A strong fireproof safe is an asset, particularly when you have important papers and cash on hand. And good lighting around the perimeter of your home and yard discourages strangers who don’t want to be seen.

Alarms are popular and fairly effective, as most intruders will bolt when that screaming alarm sounds the alert. The better burglar alarm systems include a variety of security measures like motion and sound detectors, multiple control panels, cameras, and remote control keypads. Homeowners who can afford the bells and whistles will find it well worth the investment to get the added protection.

No matter where you live and what your neighborhood is like, you can secure your home from unlawful entry. There is not a fool-proof security system; criminals are too smart and greedy for that. But if you want to install a reliable system to protect your family and prized possessions, you must make a thorough assessment.

Know what your home’s vulnerabilities are and what types of measures will secure those vulnerabilities. If you need electronic equipment, do your research and find out what’s most cost-effective and reliable before you make purchases. Consider all your options, including guard dogs or high-protective family pets, to improve home security and protect your family.

You don’t have to live in fear or buy a gun. You can take reasonable precautions that will make your house a real, safe home.

Rating: (out of reviews)

List Price: $ 2.99

Price:

Disclaimer: Paid Affiliate site of Amazon.com.

SecurityMan SM87B Wireless Door/Window Sensor for AirAlarm Home Security System
price: $10.53

• Add-on wireless magnetic door/window sensor for SecurityMan Air-Alarm system
• Wireless Transmitting Distance: ¿450ft (in open area)
• Operating power: 23A 12V alkaline battery
• Battery service life: ¿ 2 years
• Alarm Distance: < 4cm

SecurityMan SM87B Wireless Door/Window Sensor for AirAlarm Home Security System
Product Description
SM-87B is an add-on wireless magnetic door/window sensor for SecurityMan Air-Alarm system. Wireless transmitting distance is up to 450ft (in open area). It includes a 23A 12V alkaline battery which could last up to 2 years.
SecurityMan SM87B Wireless Door/Window Sensor for AirAlarm Home Security System
Disclaimer: Paid affiliate site of Amazon.com