We offer Burglar Alarm System.Popular GSM Home Alarm System with back up battery HOT!Can send SMS to 3 mobile phone No. and Auto-dial 3 phone No , Can record your voice, Call back the alarm at any time&listen what happened in the spot , Armdisarmprogram the alarm by wireless keyboard, SMS or phone , With voice reminder & password protection, Modify zone name and check the status of alarm host by SMS, Each wireless zone can match numberless wireless sensors , 8 Wireless, 1 external power failure alarm and 2 wired zones , PST-GSM-01GSM freq:9001800Mhz , PST-GSM-01A GSM freq:8501900Mhz