1Display speed and rotate speed data information, can provide speed alarm and overspeed alarm. 2Measure water temperature and voltage, low voltage alarm and water temperature alarm. 3Mileage will be displayed when the engine is flameout, convenient and fast data recording. 4By preventing the driver from looking down at the dashboard, the HUD ensures driver safety and helps the driver stay in best state. 5Exquisite and careful design, highdefinition lens display, not affected by external light. Item Type: HeadUpDisplay Material: ABS Applicable:Universal Function: 1. Speedperhour. 2. Rotate speed 3. Water temperature 4. Voltage 5. Turn off and display the mileage 6. Speeding alarm 7. Rotate speed alarm 8. Low voltage alarm 9. Water temperature alarm Operating Instructions: Simply connect the head-up display (HUD) to the Onboard Diagnostic Interface (OBD) through the OBD line and when the car engine starts, the head-up display (HUD) is displayed. 1 x Host 1 x OBD Line 1 x Reflective Film 1 x Hood 1 x Double-Sided Adhesive 1 x Instructions Please allow for errors due to manual measurement.