Dynojet Research Power Commander III USB 304-411 USB (Universal Serial Bus) port provides an instant and automatic connection to the Power Commander Control Center software; simply power up the unit and connect the PCIII USB to the computer with the supplied cable 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 continuouslymaps new calibrations for each bike for downloading at their web site (www.powercommander.com) 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