Dynojet Power Commander III USB for Ducati Monster S4 2001-2006 Fuel and ignition timing control USB (Universal Serial Bus) port provides an instant, problem-free way to connect your Power Commander to a computer Provides precise information for fine-tuning a fuel-injected motorcycle when changing an air filter, installing a new exhaust system or doing additional engine performance modifications Each unit includes a built-in microprocessor and a specific map designed to improve engine performance over stock; Dynojet continuously maps new calibrations for each bike, which are available for downloading at their website If you do not have a computer, you can change the settings with three touch buttons on the faceplate OEM-style wiring connectors with improved harness protection are supplied; no wiring modifications required