1.easy to install 2 .Can work individually 3.can work with other alarm system 4.This is separated wireless door sensors, magnetic control and 5.wireless transmit are separatad . 6.It can be installated in doors ,windows and other special places. Technical specifications Operating voltage DC12V Standby current ≤5uA Transmitting current ≤15mA Battery life 1 to 2 years Transmitting Freq. 315M or 433M Sending distance 200m (in the open area) Code mode fixed code, roll code Size: high emitter length x width x (49 mm x 38 mm x 17 mm) Magnet box length x width x height (49 mm x 14 mm x 17 mm)