... , LCD display alarm 4, wireless alarm LCD display gsm alarm system wirelessThe home LCD GSM alarm systemModel:VIP-603 Main ... also alertTechnical parameter for the gsm alarm system wireless:Operating voltage: Input 100-250V, output 12V. Wireless receiving distance: >100m Operating ... /1900MHZStandard kits of the gsm alarm system: a main panel, a wireless PIR detector, a wireless door/window gap detector ...