NOT ONLY PRODUCT DOOR CONTACT,BUT ALSO ALL ALARM SENSORS OR DETECTORS,PROFESSIONAL AND LOW ... failure, low battery, AC power shut-off, tamper switch, anti-cut phone line and so on2) 20 ... (main unit)10) With 24 hours tamper switch protected, door detector is failure or illegally disassembled, system ... distance remote control lamp or other switch devices.15) 6 groups of alarm phone call: cycling call out ...