The alarm produces sound through motor driving the wind screw type siren,so it sounds like a electric drill.
Installation: fixed base installation, you can adjust Tuyere up and down
The alarm need to be controled by sensor and switch.The correct connecting way is as below: Sensor--Switch--Siren. The siren will stop working after power off,please check whether the sensor connected switch.
Designed with 2 wires,suitable for residential building, office, factory, schools, shops, hotel, factory, public places, etc.
Note: The alarm motor cannot work for long time,the normal alarm time is about 3minutes,Overtime using will cause the motor overheat and burn.