Feature: 1. Universal Fit: Please use it within 5V. Adopt GPS mode, HUD display could work for all vehicles, such as trucks, bikes and motorcycles, you don't need to worry about compatibility. 2. Precise Positioning and Realtime Display: Display driving speed, time, voltage, driving icon, Driving mileage, automatic light adjustment, alarm sound switch, satellite number, Altitude, compass , automatic switch. 3. Overspeed and Fatigue Driving Alarm: Default setting is 120KM/H or 120MPH. When over‑speed alarm is active, it will beep in 3 times to alert the car driver, you can adjust according to whether you need overspeed alarm. 4. Clear and Intuitive: The large digital display protects the driver's eyes from dazzling day or night, making the driver feel more comfortable, especially on long drives. 5. Simple Operation: Easy to Set up, no complicated operation required. Only connect with USB cable, no professional installation is required. Compatible with all kind of cars and trucks, ect. Specification: Item Type: HUD Display Material: ABS+Metal GPS Speedometer: Collect real-time speed from GPS satellites Travel time and distance calculation and display Plug And Play: Powered through the car cigarette lighter jack, no professional installation required Display MPH or KM/h - simple button setup Light Sensor: HUD can automatically adjust brightness according to the environment, suitable for daytime and nighttime driving Overspeed Warning: 3 seconds warning beep and flashing display will warn the driver 93 beeps for overspeed alert) Alarm mute function Compass: N (North) E (East) W (West) S (South) Fitment: Compatible with all cars, trucks, bikes and motorcycles.. Package List: 1 x Hud Display1 x Sticker1 x Reflective Paper1 x Manual1 x Cigarette Lighting Line