Features: 1. Wide Application: Can be used on all cars/trucks/buses/E-scooters/E-bikes, etc. 2. Plug & Play: After connecting the power supply, it works directly, no other operation is needed. 3. GPS+Beidou Dual Chip: No jumping speed, more consistent and smooth display. The speed is very accurate and the speed updates quickly without any delay. 4. Innovative Design: With sun visor, good visibility even under the sun. Large font, clearly visible both during the day and at night. Speed units KM/H and MPH versions are available. 5. Note: The device is a digital GPS speedometer and the speed is collected from satellites. So if it is tested at home or in the parking lot, the speed may not be displayed correctly. Please test it on 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