... supply,AC 220V DC 9V Static Current,≤50mA Alarm Current,≤300mA Wireless Receiving Frequency,315/433/868 ... 0.5MHz Wireless Receiving Sensitivity,5mV/ m Outer Alarm Siren Volume,110dB Working Condition,Temperature-10°C ... you need/checking the code automatically 6. The alarm call has the priority to the normal call ... will cause the sudden alarm to prevent people from destroy. 7. Can work with the wireless P.I ...