... protocol,lcd zone alarm GSM alarm, GSM dialler, panic alarm, China Wireless Alarm System Suppliers, GSM PSTN network, Support gsm sms alarm for CID ... host(Keypad),Wireless keypad, Keychain remotes, or even remostly by phones. (PSTN alarm don’t support SMS) 8) Available in AC ... -Band(900/1800MHz)or 4-Band(850/900/1800/1900MHz) GSM Emitting Power: 2W Working Condition: Temperature: -10~50℃ Humidity:<80 ...