I have two sports cars without a spare wheel. I keep a set of tire caps and move the old supercharger from car to car. I decided it was time to replace it so I bought it in October 2020. I tried it out as soon as it arrived and everything was fine. I went out today and found my tires were flat so I hooked it up to my car and. NOTHING. Drove home, tried 3 different machines: - working AC power = no compressor - working machine 12v = no compressor The display is on, the flashlight works. but NOT COMPRESSOR. But hey, you know what works? I bought a Slime compressor in 2006! It's tiny, noisy, vibrates everywhere, but it works. Save money and buy something else.