Features: 1.Plug and play. HUD can auto adapt to vehicle type which in line with OBDII or EUOBD(On-Board Diagnostic System). 2.Comprehensive display. HUD can display many parameters at the same time as follows, 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. 3.Diversiform display mode. Driver can chose normal display mode, high- speed display mode and automatic display mode. 4. switch. Km and mile can be switched ly to meet the need of each auto meter. 5.Suitable size. The display area is 5.5 inches which is very clear for driver to read data. 6.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. 7.Flexible alarm mode. HUD can offer single-stage and four-stage overspeed alarm modes to choose to make driving safer. 8.Engine speed alarm. It contributes to shift gear in time to save fuel also has significance to new driver. 9.Flexible brightness adjustment. The brightness can be adjusted automatically or manually to reach the best state which is in harmony with the environment. Setting skills: 1.A quick refueling: Start the car,and toggle the dial button to refuel, the unit is L. 2, Generally speaking car produced after 2010 comes with air flow meter, the owner may choose 0 to see whether there is fuel consumption. If there is no fuel consumption,then set emission. After the adjustment, press the dial switch 5 seconds to return the display interface or restart the HUD. Restore factory default settings: When HUD connected cars, pls donnot to start the engine, wait for the off of HUD detection (or turn off the engine after stopping the car,HUD is off) Long-press the right key 5 seconds, then you hear a "tick" sound from HUD,which means it restore the factory settings. Clear fault codes: When HUD connected car,pls donnot start the car, put the key to "ON", waiting for HUD extinguished, long press the leftbutton for 5 seconds, you will hear "beep" sound from HUD,which means clear fault codes completed. Specifications: HUD Host Color: Black Environment temperature: -40C+80C Barometric press: 86106 KPa Relative humidity: 10%95% Environment voice: =30dB(A) Work voltage: 9V~16V DC(12V DC/400mA) HUD Host Size: Approx. 150*85*14 (mm) Net weight: 278g Package includes: 1 * HUD Host 1 * OBD 2 Interface 1 * Anti-slip Mat 1 * Reflective Film