... line3, Know which zone triggers from SMS when alarm4, 99 wireless defense zone for alarm system5, Industrial WAVECOME module, very stable6 ... SMS to alert, when power is on, will also alertTechnical parameter for the gsm alarm system wireless:Operating voltage: Input 100-250V ... the gsm alarm system: a main panel, a wireless PIR detector, a wireless door/window gap detector a siren, two remote controllers ...