The Dynojet Power Commander III USB plugs in-line with your bike s stock fuel injection system. It uses OEM-style connectors making installation quick and easy. It allows a full range of fuel adjustment, as much as +/- 100% over stock. Adjustments can be made either with a Windows-based computer or by using the face plate-mounted button adjusters. No permanent changes are made to the bike s system. Once the unit is removed, the bike reverts to its stock settings.