Viking Horns VES-145 Electric 110 Volts Air Raid Siren Type: Electric motor 110 volt Sound Rating: loud at 129 Decibels, 700/76020Hz Frequency Construction: Metal housing Mounting: 4 bolt base mount Dimensions & Weight : 10-1/4" Wide x 7-1/4" High x 6" Deep, over 16 lbs.