... home security systems,safety product,anti-theft alarm wireless alarm,zone alarm,burglar alarm,alarm system, ... , indoor: 30~50m, (depend on the surrounding environment and wireless interference)4. Standby current: < 15mA5. Alarm volume: internal ... 12 DCV9. One wireless infrared detector: 10m*120 °horizontal+60°vertical10. Optional sensor: wireless smoke detector, gas leakage detector, vibration sensor, ...