Electric Motr Alarm Siren with the external diameter of 80/100mm which makes the output of 40W sound volume. Suitable for warning information of small hoist, light transfer cars and the inside of small vessel. Body standard color : RED Material : STEEL & ABS Insulation resistance : 100MΩ(at 500 VDC) Dielectric strength : 500VAC, 50/60Hz in 1 minute Protection class : IP44 Model Voltage Current(A) Frequency(Hz) decibel Packing Size QTY Weight MS-190 DC12V 6.00 50/60 114dB 57.5*36.5*18.5 cm 40pcs 18KGS DC24V 2.50 50/60 114dB 18KGS AC110V 0.9 50/60 114dB 20.50KGS AC220V 0.43 50/60 114dB 20.50KGS