... /1800MHz & 850/1900MHz (optional) 10 Hours GSM Alarm,wireless alarm,home alarm, GSM home alarm,wireless alarm,home alarm systemDescription and Main functions IntroductionThe PATROL HWAK ... * 9 wireless guarding zones( 1 SOS alarm zone, 1 fire alarm zone, 1 external power failure alarm zone, the other 6 wireless guarding zones ...