" indicate the difficulty level for installing the product.The Power Commander is a fuel injection adjustment unit that plugs "inline" with the bikes' stock ECU. The P.C. uses original equipment style connectors so that no splicing or cutting of the harness is required. Most installations take less than 15 minutes, some as little as 5 minutes. Changes are made to the bikes fuel and ignition curves via the PC's onboard microprocessor. Using this technology Dynojet is able to offer a large area of adjustment without making any permanent changes to the bikes' ECU (electronic control unit). Removing the Power Commander returns the bike to its previous stock condition. The unit comes complete with software and cable link that allows you to change between different maps or make adjustments to a map file. The Power Commander is a fuel injection adjustment unit that plugs "inline" with the bikes' stock ECU. The P.C. uses original equipment style connectors so that no splicing or cutting of the harness is required. Most installations take less than 15 minutes, some as little as 5 minutes. Changes are made to the bikes fuel and ignition curves via the PC's onboard microprocessor. Using this technology Dynojet is able to offer a large area of adjustment without making any permanent changes to the bikes' ECU (electronic control unit). Removing the Power Commander returns the bike to its previous stock condition. The unit comes complete with software and cable link that allows you to change between different maps or make adjustments to a map file.