Also retain the manual switch, more beneficial to control the HUD. This auto head up display is powered through the OBD interface, more than a week without driving please disconnect the HUD to ...

Specifications of Upwade 5.5" Multi-Color Screen A8 car hud Head up Display OBD2 Speed Warning: Multi-color screen for easy readability Real-time speed, voltage, and water temperature display ...

[PowerBroker2] developed this HUD in a somewhat circuitous way, but it’s effective nonetheless. An ELM327 Bluetooth OBD-II reader is hooked up to the car, collecting data on speed and RPM.