12 volts with 9.5 amp 150 psi Air Compressor. This maintenance free heavy duty Air Compressor is designed for use with any high-pressure Air Horns that require an on-board air system, or many other uses that require air pressure supply. Will work with up to 1.5 gallon air tanks. Simple 2 electric wire installation. Truly a great quality product you can count on. Ideal for any 12 volt vehicles such as SUV, Truck, RV, Boat, Pick-Up and more. Air compressor dimensions: 7.4" L x 4.5" W x 5.7" H, Compressor weight: around 5 lbs. "PLEASE NOTE: THIS AIR COMPRESSOR WILL OPERATE EFFICIENTLY WITH UP TO 1.5 GALLON AIR TANKS. ANY AIR TANK LARGER TANK 1.5 GALLON WILL REQUIRE A HEAVY DUTY AIR COMPRESSOR WITH A HIGHER AIR VOLUME".