... for wireless alarm Name: LCD display gsm wireless home alarm1, gsm wireless home alarm 2, gsm network alarm3, 99 wireless zone ... display, with keypad to operate, very easy to operate2, GSM network, no need telephone line3, Know which zone triggers from ... Rated Voltage: 9V-12Vl Working temperature: -10-----+55l GSM band: 900/1800mhz and Quad band (optional)l Receiving code: ASKl Receiving Frequency: 315 ...