... alarm,home security systems,safety product,anti-theft alarm wireless alarm,zone alarm,burglar alarm,alarm system,security alarm ... : two round pins, two flat pins, three pins customized3. Wireless receiving distance in open place: >250m, indoor: 30~50m, ( ... depend on the surrounding environment and wireless interference)4. Standby current: < 15mA5. Alarm volume: internal :95dB ...