Gsm wireless burglary security alarm system
gsm wireless lcd home burglar alarm system sos motion door window sensor security wireless control host language: english working power: dc 12v 1a built-in rechargeable backup battery gsm frequency wireless frequency: 433mhz wireless pir motion detector installation mode: wall mounted installation height: about 2m detecting distance: 4-8m work frequency: 433mhz power source: 9v battery included wireless door/window gap detector wireless frequency: 433mhz power supply: 23a 12v battery included