This HomeSafe® Wireless Home Security Motion Sensor can detect motion from up to 8 meters away and has 110-degree motion detection angle. 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: 2 3/4″x4 1/4″x1 3/4″