1. S100 series, dual screen linkage 2. Multifunctional OBD instrument, front display+floating projection 3. Surrounding shading design, high-definition display 4. Linkage of 8 alarm atmosphere lights. a. Vehicle speed alarm, speed alarm, water temperature alarm, voltage alarm, turbine pressure alarm, engine oil temperature alarm, transmission oil temperature alarm, engine oil pressure alarm. b. Atmosphere light linkage alarm, gradually flashing from the middle to both sides and emitting a drip sound 5. Dual unit switching, strong compatibility. Metric and Imperial units can be switched freely, supporting most OBD II models after 2008, compatible with K-line vehicles, and stalling displays subtotal mileage and driving time Celsius temperature ( C) Fahrenheit temperature ( F) Display function: 1: Speed per hour 2: Tachometer 3: Water temperature 4: Voltage 5: Fuel consumption 6: Turbine pressure 7: Oil temperature 8: Oil pressure 9: Transmission oil temperature Name:HUD Display Output frequency:top view Special function:HUD Working voltage:DC9-16V Colour:Black Material:Plastic Size:90x55x30mm Package Contents: 1 * 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.