The mo.can OBD is a digital adapter for easy connection of our instruments directly to the diagnostic interface of Harley-Davidson™ vehicles built from 2004 onwards. Plug & Drive, it couldn't be easier. A tiny box eliminates the need to install sensors for speed or engine speed. Every Harley-Davidson™ vehicle built from 2004 onwards* has this interface as a 4-pin plug connection on the vehicle. With the help of the mo.can OBD digital adapter, which is simply plugged into this connector, motogadget instruments can read the speed, RPM and MIL (engine warning light) directly from the vehicle data bus.