GSM module of geo-positioning CO GeoLoc from the manufacturer VDO. Specially designed to fit outside the VDO digital tachograph case. It can be installed anywhere in the cab, but it is better to install it on the windshield.
It is necessary to avoid additional interference. Due to its wide operating voltage range, this module is suitable for installation in any vehicle.
Data exchange with the digital tachograph takes place via the CAN bus. For the tachograph, this is another duplicate source of movement data, which makes it possible to even more accurately determine the vehicle's location and position for more accurately plot its movement route.