The WR Speedo is driven by the motor and is inaccurate up to 10% in the stock configuration. Change your gearing and it gets worse. This speedo calibration device is the smallest in the world and has the widest calibration range available. It has a simple plug and play installation that you do have to program, but easily done just using your current gearing. Change your gearing, easy to change your speedometer.

Other beneficial features include:

• Saves max speed, which can be recalled to your stock speedometer gauge
• Built in testing mode to ensure proper installation
• Works for vehicles which display MPH or KPH
• Ability to convert MPH to KPH, or KPH to MPH
• Ratio based correction in 0.1% steps, up to 99.9% + or -
• Weather proof design to protect against the elements
• 18" wiring harness (1.5 ft.)
• 3 year product replacement warranty
• Made in the USA!