Performance II Series instruments have the combined style of European sports car and racing gauges. This performance look has a classic gauge feel without the "in-your-face" look of a racing gauge's Full sweep stepper motors for higher dial resolution and blue LED back lighting at night. flat glass add to the high class, OE installed look. Just like always, NVU does not have any logos on the dial so the final result will be a professional, custom look. GENII Speedometers operate from any speed signal from 3,000-64,000 PPM , OE, aftermarket or GPS (sender not included, check your application) and are easily programmed by entering calibration mode and driving a mile, that's it! LED backlit dials for easy viewing at night while retaining the style you have come to expect from NVU. Kit includes:3-7/16" speedometer, wiring harness and plug, spin-on back clamp, programming button and detailed instructions.