Features: 1. Wide Application: Can be used in all cars / trucks / buses / electric scooters / electric bicycles, etc. 2. Plug & Play: Works immediately after power is connected, no additional configuration required. 3. GPS+Beidou Dual Chips: No jumping speed, more coherent and smooth display. The speed is very accurate and updates quickly without delay. 4. Innovative Design: With built-in sun visor, good visibility even in sunlight. Large font, clearly visible both day and night. Speed unit KM/H and MPH versions are available. 5. Note: The device is a digital GPS speedometer and the speed is obtained from satellites. Therefore, the speed may be displayed incorrectly if tested indoors or in a parking lot. Test it in the car outdoors with 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 Working current: 200-300mA Working temperature: -25-75 Package included: 1 x GPS HUD Digital Speedometer 1 x USB cable