The Speedo DRD corrects and fixes the speed signal after it was altered by something else, such as sprocket changes or tires size changes or transmission changes.

The Universal Kit does require some basic wiring to install. It's fairly easy, and only 4 wires; [positive, ground, signal-in, signal-out]. Universal Kit works for Cars, Trucks, & Motorcycles with digital odometers, and 3 wire speed sensors.

• Smallest electronic speedometer/odometer calibration device in the world
• Simple plug-in installation
• Weather proof design to protect against the elements