... for home alarmMain features: 1, LCD display, with keypad to operate, very easy to operate2, GSM network, no need telephone line3, Know ... , Industrial WAVECOME module, very stable for home alarm system 6, Can call 5 phone numbers and send the SMS when alarm7, Can home ... temperature: -10-----+55l GSM band: 900/1800mhz and Quad band (optional)l Receiving code: ASKl Receiving Frequency: 315/433MHZ. and 868 ...