Features: 1. Wide Application: Can be used in all cars/trucks/buses/e-scooters/e-bikes, etc. 2. Plug & Play: Works immediately after connecting the power supply, no further actions needed. 3. GPS+Beidou Dual Chips: No jumping speed, smoother and more consistent display. Highly accurate speed, fast updates without delay. 4. Innovative Design: With sunshade, good visibility even in sunlight. Large font size, clearly visible day and night. KM/H and MPH versions available. 5. Notice: This is a GPS digital speedometer; speed is collected from satellites. Therefore, if tested at home or in a parking lot, the speed may not display correctly. Test it outdoors in your vehicle with a good signal. Specification: Material: ABS Product Color: Black Product Size: 80 x 31 x 54mm Product Weight: 200g Satellite Frequency: 1575mhz Input Voltage: DC 12V Operating Current: 200-300mA Operating Temperature: -25-75°C Package Includes: 1 x GPS HUD Digital Speedometer 1 x USB Cable