SpeedoDRD H3 Speedometer Calibrator;

The smallest electronic speedometer/odometer calibration device in the world. â—¦ Saves max speed, which can be recalled to your stock speedometer gauge â—¦ Widest calibration range on the market (ratio based and multiplier/divider capability) â—¦ Built in testing mode to ensure proper installation â—¦ Easier to setup than any other device on the market â—¦ Simple plug-in installation for many vehicles using factory OEM connectors â—¦ Works for any 3 wire Hall Effect Sensor, or 2 wire Ground Switch Sensors â—¦ Works for vehicles which display MPH or KPH â—¦ Ability to convert MPH to KPH, or KPH to MPH â—¦ Ratio based correction in 0.1% steps, up to 99.9% + or - â—¦ Fractional frequency multiplier & divider with 0.1 steps, up to 99.9 + or - â—¦ Weather proof design to protect against the elements â—¦ 18" wiring harness (1.5ft) â—¦ 3 year product replacement warranty â—¦ Made in the USA