Car Digital GPS Speedo Speed MPH HUD Head Up Display Speedometer Universal Features: Function: The product uses GPS and Beidou microsatellite positioning to monitor and display the vehicle speed in real time. The unit of speed is MPH (miles per hour). 100% new high quality Plug & Play: After connect power supply, it will work directly, no need any other operation. No Skip Speed: No skip speed, more coherent and smooth display; Innovative Design: with sunshine hood itself, good review even under sun; Large Font, Clearly visible both during the day and at night; Notice: The Device is GPS Digital Speedometer, and speed is collected from satellites. So if tested at home or parking lot, perhaps speed can't display correctly. Please test it on the car outside with good signal; Wide Application: Built-in GPS Chips, suitable for all cars, buses, trucks, bikes, scooters. Specifications: Condition: New Name: Car HUD Speedometer Monitor Display mode: MPH NOTE: cannot convert to KM/H) Material: ABS+PC Color: as shown Size: 80*54*31mm