On-board GPS distance measuring, coordinates and data memory.
 
No Calibration.  No Installation.  No External Sensor required.
 
Accurate, reliable and easy to operate, our RAC GEO II units are the industry standard Distance Measuring Instrument (DMI). These cost-effective units save time and money by allowing personnel to measure distance, accurate up to 1 foot per mile, while driving as fast or slow as necessary. The RAC GEO II can accurately record distance and data using GPS coordinates or two other types of external sensors.
 
External Distance sensors read and modify the data coming from your vehicle and send a signal to the DMI telling it when to count distance. These can be used in place of the RAC Geo II's internal GPS sensor. There are currently two types of distance sensors that can be used:
 
Magnetic:
The Magnetic Distance Sensor uses the oldest technology of all the sensors, but when properly installed, remains the most accurate. This sensor works in any vehicle.
 
Autolink OBD:
You plug the AutoLink II into the OBD interface on your vehicle, then plug the AutoLink Pro into your RAC's power port using the provided telephone-style cable. That's it. No getting under the hood, no splicing wires, no tools required.