Car Head-Up Display (HUD), C80P Digital GPS Speedometer with MPH/KMH Speed Alert, Fatigue Driving Alarm, 4.5-inch LED Screen, for all cars

【GPS Speedometers】 Quickly collect speedometer readings from GPS satellites, and the satellites can be locked in real time. More accurate than OBD HUDs, the GPS HUD operates on the same logic as speed radar. It offers 100% versatility for all vehicles, including cars, vans, SUVs, trucks, trains, scooters, motorcycles, bicycles, and boats. 【GPS HUD Display】 Displays driving speed, single-trip time, and mileage. When using it in a car, plug it into the car's USB port. If there is no USB port in the car, you will need a car adapter or plug it into a power bank (not included). 【Overspeed Alarm】 The default vehicle speed setting is 120 km/h. When the overspeed alarm is active, it emits 3 beeps to alert the driver. Simply press "up" or "down" to adjust it. To disable the speed warning, simply set the overspeed threshold to a very high value. 【Accuracy】 As usual, it's 2-5 km/h above the car's engine speed. The displayed speed can be easily calibrated manually. Do this 2 to 5 miles in advance to avoid speeding tickets.