# About ADU - Additional Display Unit. A vehicle add-on display device that uses an ELM327 Bluetooth adapter to communicate with the vehicle's ECU to display vehicle speed, RPM, water temperature ...... , as well as dispaly interior temperature and humidity, atmospheric pressure, pitch (gradient) and roll angle, GPS information, and other data. ## Supported OBD Adapters * Vgate iCar2, iCar3, iCar Pro series adapters with BT3.0 or BLE capability (iCar Pro BLE & iCar Pro 2S recommended) * Vgate vLinker FD/BM/MC series adapters with BT3.0 or BLE capability (not tested, but should be supported) * Normal adapter with Bluetooth for Master 25K80 v1.5 (only KINGBOLEN recommended) * Other OBD Bluetooth adapters not tested yet Vgate vLinker FS/MS series Bluetooth adapters connection names seem to have numerical suffixes and are different, non-fixed, therefore may not easy to use. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://adu.ppgg.in/readme.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.