... Al-alloy with plastic surface. Alarming type: Buzzing device, light. Main Technical Data RatedVoltage(V)Power(W)SparkingFrequencySound Strength(dB ... proof lighting,Lighting explosion-proof,Explosion proof lighting,Explosion proof light,Explosion proof lamp,Explosion proof lamps,Explosion proof lights,explosion ... proof,alarm lamp,alarm lamp ex proof Certified BBJ Coal Mining Audio Light Alarm LED Lamp