Function Adapt wavecom double frequency gsm module. 8 wireless guarding zones, 2 hardwire guarding zones. Arm/disarm remotely by any telephone or mobile. Support 3 groups of sms alarm phone numbers, which receive alarm message while host alarm. Support 3 groups of auto-dialed alarm phone numbers and drive wiretap. Report guarding zones remotely by sms or voice. With voice reminder while the host is working. Support dialog. With sos and fire alarm guarding zones. External power damage alarm. With standby rechargeable battery.