V.U Device on digital tacho download?

just underneath my driver information, when downloading my digicard, it has the section vehicle unit download, what is this?

1984_carl:
just underneath my driver information, when downloading my digicard, it has the section vehicle unit download, what is this?

The vehicle unit download has to be downloaded no more than 56 days from the last VU download, I’ve no idea why it would appear under the driver information on the software, just the way that particular analysis software is written I suppose.