... Hours GSM Alarm,wireless alarm,home alarm, GSM home alarm,wireless alarm,home alarm systemDescription and Main functions IntroductionThe PATROL HWAK alarm system adopts SMS ... frequency GSM module* 9 wireless guarding zones( 1 SOS alarm zone, 1 fire alarm zone, 1 external power failure alarm zone, the other 6 ... AC Adapter·One Manual Wireless GSM home alarm system with GSM 900/1800MHz or 850/1900MHz