This device is designed for downloading the tachograph and driver card from the vehicle's digital tachograph using the front connector. The downloaded DDD files are stored in the device from where they can then be downloaded via Wifi or USB to a PC / mobile phone or tablet. In USB mode, the device looks like an normal USB drive when connected to a PC. When connected via Wifi, the saved files are accessed via a web browser.
The actual download is completely automatic. All you have to do is activate the ON/OFF switch and connect it to the tachograph. The end of the data download is indicated by LEDs.
Because the device contains a rechargeable battery and does not require an external power supply to run. Charging, if necessary, is possible using a standard mobile phone charger with a micro usb connector.
More information can be found in the manual.