Actually I found the compressor is not bad, but unfortunately I had a bit of bad luck with the device. Had me specially the Car Adapter ordered, but was totally unsuitable, since the inrush current was> 3 amps. Even an attempt to operate the compressor at the car directly was to no avail. Besides a clacking gave the compressor no sound. Too bad, wrapped unit back and right back. Have now decided for a high end compressor.