Features: 1) High sensitive and strong anti-interference 2) Without installation of wires and cables, wireless transmitter and wireless receiver, DIY project 3) Eight defense zones model, 4 wire and 4 wireless defense zones, eight LED matches eight defense zones, LED will flash when alarm triggered 4) Record message for ten seconds , Program six groups of telephone numbers 5) Auto-call pre-programmed telephone numbers consecutively and with a recorded message when alarm is triggered 6) Two alarm models for user\'\'s option, mute alarm and audible alarm 7) Arm/disarm the main panel by password is at user\'\'s option 8) With independent key-chain remote controls, through them users can arm / disarm the alarm system 9) Separately arm/disarm for certain zones 10) Urgent help function is available for 24 hours a day whether the main panel is in armed/disarmed condition 11) Self-alarm when telephone cable is disconnected or destroyed 12) Add or reduce additional spare parts to the main panel is according to user\'\'s option 13) With back-up rechargeable battery, it can continue to supply power for 36 hours when power is failure 14) Can finish functions settings through the keyboard on the main panel 15) Anti-dismantle function, the host will self-alarm when its cover destroyed or opened illegally Specifications: 1) CE, CCC certified 2) Working frequency: 315MHz/433MHz 3) Power adaptor: input AC 220V, 230 - 240V, 110V, output DC 9V, 300mA 4) Stand-by current: 85db 10) Dimensions: 340 x 250 x 78mm (gift box) 11) Net weight: 1,200g