... phone send SMS to 3 phone GSM Security Alarm with LCD display for House Guard(LS-GSM-002) You ... wireless door/window contact, wireless smoke detector, wireless gas leakage detector, wireless glass break sensor etc. Each ... system status, while its power is offconnect with the alarm center through GSM network2. Technical parameter:Power ... 1AC/DC Adaptor*1 GSM Security Alarm with LCD display for House Guard