Fangrui Product Details 1. Plug And Play Connectivity With Any Obdii Or Euobd Capable Vehicle 2. Screen 3.5-inch Hd Display 3. Multi-color Design Makes The Screen Clearer And Easier To Read 4. Nano-technology To Double Reflections, More Clarity 5. Rich Contents: Speed, Rpm, Water Temperature, Voltage, Single Driving Distance, Low Voltage Alarm, High Water Temperature Alarm, Over Speed Alarm, Freely Switch Between Kilometers Miles. Item Condition: New Name:head Up Display Output Frequency:eu Obd2 Interface Rated Power:12v Sku:a900 Head Up Display:hud 1. Engine Rpm 2. Water Temperature 3. Rpm Unit 4. Alarm (on/off Option) 5. Speed Unit At Km/h 6. Speed Unit At Mph 7. Voltage 8. Multi-function Area: Speed, Water Temperature, Voltage 9. Light Sensor (automatically Adjust The Brightness According To The Environment) Auto Power On/off: Hud Power Up And Power Down With Vehicle, Effective Protection Of The Car Battery With Manual Switch Mode. 5-level Brightness Adjustment, Automatic And Manual Brightness Adjustment Mode. Obd2 / Obd