Speedometer Signal Interface, Classic Instruments, 1970-72 CH/EC/MC

Provides accuracy and aids calibration

Ideal for any vehicle

Get accurate readings from your speedometer with one of these optional tools available from Classic Instruments. The signal interface model converts the electronic signal from your transmission to an accurate speed-reading using either and 8,000 or 16,000ppm signal. Set your speedometer with a pushbutton and calibrate with the mile-marker method. Each interface model features a 12-volt power source, which helps eliminate interference. The “Sky-Drive” sending unit utilizes GPS technology to program and calibrate your speedometer. Mount this compact and lightweight unit anywhere and with the push of a button, you can set your speedometer up for miles per hour, kilometers per hour and more. Each unit comes with complete directions to provide a hassle-free installation experience. Satisfaction guaranteed.