Chamberlain Add-On Motion Sensor For Wireless Motion Alert System

The Wireless Alert Sensor is a Passive Infrared Motion Sensor that detects movement of people and vehicles while allowing small animals to pass through undetected. Each sensor has its own unique ID for a secure radio link. The base station not provided can learn the signals of up to 8 sensors The base station gives a single beep for the first sensor that is programmed a double beep for the second and so on. Additionally multiple base stations can work with the same sensor to sound in different places. Transmits signal to base station up to a half-mile away.