Multi functional display: vehicle speed, water temperature, voltage, mileage Engine malfunction diagram, water temperature icon Voltage icon fatigue driving icon MPH speed in miles (km/h), MPH mile (mph) using:Restore factory settings:Unplug the power' Press and hold the 'M' key, do not release it. After plugging in the power, the screen will light up completely, and then release the 'M' key to restore the factory settings Switch alarm sound:After the HUD displays normally, long press the '-' button for 3 seconds to turn off the buzzer, and long press the '-' button again for 3 seconds to turn on the buzzer Automatic start stop or oil electric hybrid:Press and hold the M key for 3 seconds to enter the settings. In the 10th option of the settings, set the shutdown voltage to 1. Press and hold the M key for 3 seconds to save and exit Enter setup mode:When setting up, please watch the image on the windshield for operation. Long press the 'M' key for 3 seconds to enter the setting items (1-12), and the menu will display: 1. Use the '+' key to add menu options, short press the M key to enter parameter values and flash, short press the '+' or '-' key to adjust parameter values, short press the M key to return to the menu, long press the M key for 3 seconds to save and exit (The product appearance and printed words may vary depending on the batch, but this does not affect use) Color: As shown Material: plastic Package Contents: 1 x M3 OBD2 HUD Car Projector Display Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.