Delivers a big, steady air supply to run all air horns Inflates tires, shocks, air mattresses, other inflatables Fast-pumps 400 cu. inches of air per minute Mounts under hood, in trunk, rear storage area, almost anywhere 6-1/8"L x 3 1/2"W x 5-1/8"H compressor is balanced and then mounted on rubber bushings to virtually eliminate all vibration. 12V — draws only 10 amps.