HOMESAFE Wireless Home Security Sensor

  The HomeSafe Wireless Home Security Sensor is an additional sensor to be added on to an existing HomeSafe Security System. This sensor is designed to detect vibration when a window or door has been opened. When triggered, the sensor sends a wireless frequency signal with a range of 300 feet back to the base alarm unit. The base unit then sets off the alarm. Easy wireless installation.   Requires the use of one 9 volt battery (not included). One year Manufacturer's Warranty.