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 ATV when changing an air filter, installing a new exhaust system or doing additional engine performance modifications. Includes a built in microprocessor and a specific map designed to improve engine performance over stock; Dynojet continuously maps new calibrations for downloading on their website (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. Easy to follow instructions included. Software is compatible with Windows 98se/ME/2000/XP; opens all maps with .djm extension. USB special cable and 9V batter power adapter are included. Made in the USA.