The liquidA3/S3 is a multi-function gauge & diagnostics tool which can display many types of information related to your car's performance. Displaying data in either a traditional gauge format as well as a scrolling graph allowing data history to be seen visually.
The A3 version is supplied with a black outer ring, per the picture.
The S3 version is supplied with a sliver outer ring.
This item is supplied fitted to an A3/S3 8P vent (installation instructions supplied) and is plug and play with only one cable plugging into the OBD2 port