Groupstars New Design Multi Car HUD Vehicle-Mounted Head Up Display OBD II System Model Display of Vehicle Speed, Engine Speed, Water Temperature, Driving Mileage, Fuel Consumption, Rest Tips, Engine Failure Plug-and-play. Automatically adapt to the automobile models with OBD II (Bus Automatic Diagnostic System) interface. Display the engine speed, speed, voltage, temperature, fuel consumption and other information on the front windshield of the driver's eye level. Overspeed warning, more security for driving. The precise, HD and high-brightness LED display, easy to read information. The gear shift warning, conductive to new driver learners. The display brightness can be automatically or manually adjusted. Updated and newly added functions, more stable and better performance. 100% Brand guaranteed and high quality.