Telephone network protection, short message sending function....! It is compitable with our accessories,such as sensor,detector,siren etc... User doesnt need to connect it with telephone line because it can be work as a mobile unit. FUNCTION DESCRIPTION: User just inputs orders to set up each step according to the maunal guide. Set up recorded voice: Six group of alarm telephone number stored Mute alarm Set up siren hooting time. Password preset Short message sent System reset order. INFRARED ACTIVATED / DEACTIVATED INDENPEDENTLY; EMERGENCY FUNCTION; LONG-DISTANCE REMOTE CONTROL: by means of alarm mobile /phone to switch on and off the security (control) system and to receive the information from the sensors as well. The simple way to install: A, Please put the GSM main unit in proper place. B, Take one mobile SIMCARD to put into the main unit. Please open the cover carefully and insert the SIMCARD properly. C, After that, please tighten the screw. D, Accordingly insert the power and siren, once you hear one sound "B", it means this alarm system starts to initialization. E, Auto-check GSM network and log on. Initialization time is about one minute. The activated LED flashes as initialization.. F, System initialization completed, you can hear one long sound "B", the activated LED stops flashing and becomes normal, that means the whole alarm system is now activated. If network logging on is failed, the network LED flashes. If initialization is failed, you can hear constantly short sound "B", that means SIMCARD is out of network or boot-strap uncompleted. The system is not available to dial out telephone number, just fitting independently locale alarm. G, The boot-strap processing of the System is successfully completed.