... alarm host, very easy operation. 10) Non-volatile chip, information stored automatically when off power. 11) Disconnection alarm, auto ... functions. 14) Built-in Lithium backup battery, perfect system self-check, alerts of no SIM card, alarm host low power, no ... : < 500mA Working Condition: Temperature: -10~50℃ Humidity: <80% Backup Battery: Lithium 3.7V / 800mA h (Rechargeable), Standby Time:≤16 ...