Features: 1. Wide Application: Can be used in all cars / trucks / buses / electric scooters / electric bicycles, etc. 2. Plug & Play: After connecting the power supply, it works directly, no need for additional actions. 3. GPS+Beidou Dual Chips: No jumping speed, more consistent and smooth display. The speed is very accurate and the speed is updated quickly without delay. 4. Innovative design: with sun protection, good visibility even in the sun. Large font, clearly visible both day and night. Speed unit KM/H and MPH versions are available. 5. Note: The device is a GPS digital speedometer, and the speed is collected from satellites. So if tested at home or in the parking lot, the speed may not be displayed correctly. 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 Includes: 1 x GPS HUD Digital Speedometer 1 x USB Cable