Touchpad LCD GSM Alarm -GSM PSTN network,1200mA battery -Support gsm sms alarm for CID -Simple menu, ... alarmLCD Touch screen control,GSM&PSTN combinedSleek design,Backlight,Dual network alarmRemote activation via telephone or SMSBuilt-in 1200mA backup battery100 ... security system will send SMS and call users via GSM network.2. How to use after I buying a security gsm ...