Sedeta? New Universal Car Auto 5.5 inches Safe OBD_II Interface HUD Head Up LED Display Warm System Vehicle Speed Fuel Icon Showed Applicable OBD II Generations after 2003 Interface Guarantees safety driving. Driver can now see speed directly on the windshields with this HUD, make the driver pay the most attention to drive. Decrease the traffic accident. Comprehensive information showed. All important vehicle info showed, such as vehicle speed, engine speed, water temperature (voltage, throttle valve position, ignition advance angle, time of 100 km acceleration),fuel consumption, mileage, low fuel tips, engine failure. Diversiform display mode. Driver can chose normal display mode, high- speed display mode and automatic display mode. Km and mile can be switched freely to meet the need of inch auto meter. Automatic power on and off. Starting with the vehicle starting, stopping with the vehicle stopping to protect the vehicles battery. Moreover, we pre-serve the hand switch function to control the HUD. Flexible. Engine speed alarm, it contributes to shift gear in time to save fuel also has significance to new driver. Whats more? The brightness can be adjusted automatically or manually to reach the best state which is in harmony with the environment.