... wireless zones 2.Suitable for home, office, shop 3.Quad band GSM frequency 4.Voltage: 110V-240V 5.433mhz, 315mhz Functions & ... keypad; Big LCD displays, NO EXTERNAL GSM ANTENNA ON THE PANEL2. GSM network, Support 850/900/1800/1900MHZ3.10S record+ Arm Delay + ... around 24 hours, Full charging time: 8hours 4.4-Band : 850/900/1800/1900Mhz5. GSM transmit power: 2W 6.Receiving and emitting range: > ...