The SwitchSpeed management package includes everything you will need to get your ONAIR kit on the road. You will now have three programable valve speeds; precise, moderate and full. The VU4 Valve Unit is designed to be reliable while looking good. The VU4 has built in push to connect 3/8” D.O.T. fittings that offer tight sealing and incredible reliability. This package also includes VIAR 400C compressor(s) and a 5 Gallon Aluminum Tank.