1.GSM module used All over frequency adopted 2.Without installation of wires and cables, wireless transmitter and wireless receiver, DIY project 3.Support Chinese/English message reply automatically by GSM network mobile when alarm is triggered 4.With a keyboard on the main panel for input information and finish function settings 5.Record message for ten seconds 6.Program six groups of telephone numbers 7.Auto-call pre-programmed telephone numbers consecutively and with a recorded message when alarm is triggered 8.Two alarm models for user's option, mute alarm and audible alarm 9.Arm/disarm the main panel by password is at user's option 10.With independent key-chain remote controls, through them users can arm/disarm the alarm system 11.Separately arm/disarm for certain zones 12.Ask for urgent help by using the remote control when in trouble condition 13.Urgent help function is available for 24 hours a day whether the main panel is in armed/disarmed condition 14.Long distance operation to the main panel by password. Including remote access, remote monitor, remote activate and deactivate 15.Add or reduce additional spare parts to the main panel is according to user's option 16.With back-up rechargeable battery, it can continue to supply power for 36 hours when power is failure 17.Can link up to the networks of alarm center through an ID code 18.users can monitor and frighten intruders and burglars, monitor fires and gas leakage,ask for help in trouble condition and let the system continue to service you when AC power is failure. In all, it safeguards users all the time and avoid accident happen. 19.Widely used at home, shop, school, hospital, factory, warehouse, bank, government, etc.