Wavecom GSM module.
8 wireless zones ( 1 wireless SOS zone, 1 wireless fire alarm zone,the other 6 wireless zones can be defined by user).
Can Auto-dial 3 groups phone No. and 3 SMS while alarming.
You can call the mainframe at any time and listen what happened in the alarm area.
Switch to Backup rechargeable battery when power is failure or cut by intruder. Will send SMS and call you when AC power cut or recovered.
Arm/disarm and set the alarm system by phone.
Can connect with intercom. You can talk to the mainframe with intercom.
Can connect with the monitoring center through GSM network.
Support all kinds of wireless detectors.
With Human voice guide and easy to operate.
With voice reminder & password protection while the system is working.
Can report alarm zone by voice
Radio frequency: 433MHz or 315MHz for choice
GSM band: 2 bands GSM900/1800MHZ 
                     4 bands (GSM850/900/1800/1900MHZ)  available