Easy, Fast, Wire Free Installation: Infrared sensor detects motion and sends a signal to the receiver.
Wireless Plug-in Receiver: The portable wireless plug-in receiver plugs into any standard outlet. The sensor uses 3 AAA batteries (Not Included).
Working Range up to 328 feet (100 meters) between receiver and transmitter allowing you to place it a good distance from the receiver to warn you of arrival and departure of family members
Ideal for front doors, window frames, driveways, walking paths, and anywhere in your home you want to be alerted to motion.
Note: Includes 1 plug-in receiver unit and 1 motion sensors requiring 3x AAA batteries (Not Included). Receiver size: 3.14" L x 2.99" W x 1.29" H (80 x 76 x 33mm) Sensor Size: 3.14" L x 2.32" W x 1.77" H (80 x 59 x 45mm)