... alarm system5, Industrial WAVECOME module, very stable6, Can call 5 phone numbers and send the SMS when alarm7, Can home arm ... alarm system 10, Can support all kinds of wireless sensors, such as PIR detectors, door (gap) sensors, gas sensors, smoke sensors, beams ... the gsm alarm system: a main panel, a wireless PIR detector, a wireless door/window gap detector a siren, two remote controllers, a ...