Bidirectional Wind Screw Alarm MS-490/590/690/790/190 Electric Motor Air Defense Alarm Buzzer 220v

Bidirectional Wind Screw Alarm MS-490/590/690/790/190 Electric Motor Air Defense Alarm Buzzer 220v Product name: Bidirectional motor air screw alarm Product model: MS-490 Working voltage: AC220V Pressure level: 150 decibels Product material: metal Installation method: Screw fixed Product name: Bidirectional motor air screw alarm Product model: MS-590 Working voltage: AC220V Sound pressure level: 160 decibels Material: metal, die-cast housing Installation method: Screw fixed Vocalization form: Continuous vocalization Product name: Bidirectional motor air screw alarm Product model: MS-690 Working voltage: AC220V Pressure level: 170 decibels Material: metal, die-cast housing Installation method: Screw fixed Product name: Bidirectional motor air screw alarm Product model: MS-790 Working voltage: AC220V Pressure level: 180 decibels Material: metal, die-cast housing Installation method: Screw fixed Product name: Motor fan screw alarm Product model: MS-190 Product material: metal shell Sound pressure level: 100-120 decibels Installation method: Screw fixedWidely applied:For civil air defense and civil air defense alarm systems; Alarm systems for mines, explosions, prisons, reservoirs, power stations, substations, airports, police stations, military bases, etc. Alerts for natural disasters such as earthquakes, tsunamis, floods, flood control and disaster relief, mudslides, landslides, typhoons, fires, minefields, and forest fires; Fire protection or emergency alarm systems for factories, schools, docks, warehouses, public buildings, commercial areas, residential areas, ports, etc.Function:✅ Penetrating power✅ Rotating at high speed✅ Anti-rust and anti-corrosion✅ all-copper winding✅ Waterproof and moisture-proof✅ has a quick response