BQLZR Siren Bell Clock Industrial Siren AC 110V, Industrial 110dB MS-190 Alarm Sound Motor High Power Buzzer Siren ,Suitable for Home, Industrial, Shop Alarms,Orchard

He 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.. It needs a separate switchgear. Without it, the alarm will sound when powered on. When the plug is connected, the alarm will sound. When the plug is pulled off, the alarm will close. The decibel is 110db which cannot adjust... Please note that there is no grounding wire on the alarm. If you want to plug the product directly into the standard AC wall socket. It needs to be fixed on the object you need to place, because if it is not firmly installed, the force of the internal rotating fan will make it tumble and rotate out.. Shell material: iron, leaf material: ABS. Suitable for home, residential, industrial, shop and control systems, most commonly used for warehouse alarms