# Functions * Displays speed, RPM, water temperature ...... data obtained from the vehicle ECU etc. obtained from the vehicle ECU * Displays temperature, humidity, and atmospheric pressure data of the vehicle interior * Displays vehicle pitch (slope) and roll angle, and GPS information data * The ADU starts automatically when the vehicle is started and powers off automatically when the engine is turned off * Automatically adjusts the brightness of the main and secondary displays according to the ambient light intensity * Manual power-off switch on the main unit to allow the ADU to be powered off when needed for temporary use of the ELM327 Bluetooth header --- # 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/functions.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.