This HomeSafe® Wireless Home Security Vibration Sensor is a double sensor that detects vibration and when your door/window has been opened.

It has a wireless radio frequency range of 300 feet.  When triggered the RF signal activates the alarm.  Uses one 9-volt battery (not included).  Easily protect every window and door of your home.

Dimensions: 3 1/2"x2 1/4"x1"

Instructions:  1STHA-SENSOR