feature: 1. Plug and Play: Automatically match the models of OBD II or EOBD (European On-Board Diagnostics). 2. For safer driving: omit your bow to the dashboard, just focus on the road ahead and you will notice your driving data. 3. Overspeed alarm: Set the overspeed buzzer alarm to remind you when the speed limit is exceeded. 4. Multi-color high-definition display: the picture is richer and easier to read. 5. Adopt nanotechnology: eliminate unnecessary reflections and present a clearer picture. 6. Rich display content: vehicle speed, engine speed, water temperature, voltage, mileage, shift reminder, driver fatigue reminder, low voltage alarm, high water temperature alarm, overspeed alarm, engine failure alarm, trouble code exclusion, km/mile free change files. 7. Simple projection: The picture is simple, you can easily grasp very important data, name the speed, some alarms and engine speed, 8. Automatic switch: According to the automatic switch of the car engine, it can effectively protect the car battery. Except, for better control of this HUD, the remaining manual switches. 9. Automatic and manual brightness adjustment: Automatically adjust brightness to provide clearly visible projection in direct sunlight or at night. 10. Detect accurate driving information from your vehicle ECU through OBDII system. Specification: Type: HUD X5Material: ABSColour: BlackDisplay Type: DigitalModel: with on-board diagnostic OBDII interfaceProduct size: (3.55x1.97x0.47)" / (9x5x1.2)cm (L x W x H) Projection size: 3.0 inchesEnvironment: ~40c 80c atmospheric pressure 86-106kpauyAlarm sound level :