Keep an eye on your speed without looking down.Instantly see when you're driving too fast. Keep it safe. Avoid speed violations.Your real-time OBD-2 data without glancing at the dashboard.Speedometer, RPM, engine temperature, voltage, and more! Features: 1. Automatic sensitivity: automatically adjust brightne and darkne2. Engine speed (RPM) display3. Single driving distance (M/KM) display4. Water temperature (C/F) display5. 0-10km acceleration time display6. Clock display7. Single driving time display8. Voltage display9. Fuel consumption display (L/100KM fuel consumption per hundred kilometers/L/H instantaneous fuel consumption)10. Alarm function: (overspeed alarm, speed alarm, water temperature alarm, voltage alarm, fatigue driving reminder)Product introductionHUD short for head up display. It displays driving datas on the front windshield such asspeed,water temperature,voltage,single mileage etc; to avoid drivers unsafety because of watching the instrument while driving.Drivers can read the driving information instantly , and can always keep the best state on the way with HUD. Install it yourself in minutes. Just find the OBD-2 port and connect the scanner (included). Package Included:1 x Car Portable Speed Monitor