... LCD display alarm 4, wireless alarm LCD display gsm alarm system wirelessThe home LCD GSM alarm systemModel:VIP-603 Main Features :1, LCD ... when power is on, will also alertTechnical parameter for the gsm alarm system wireless:Operating voltage: Input 100-250V, output 12V. Wireless ... : 433 MHZ, 850/900/1800/1900MHZStandard kits of the gsm alarm system: a main panel, a wireless PIR detector, a wireless ...