Features: 1. Wide application: Can work on all cars / trucks / buses / E-scooters / E-bikes, etc. 2. Plug & Play: After connecting the power supply, it works immediately, no other action is needed. 3. GPS+Beidou Dual Chips: No jump speed, more coherent and smooth display. The speed is very accurate, and the speed is updated quickly without any delay. 4. Innovative design: With sun protection cover, good review even your sun. Large font, clearly visible both during the day and at night. Speed unit KM/H and MPH versions are available. 5. Please note: The device is 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 on the car outdoors 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 Working Current: 200-300mA Working Temperature: -25-75 Package Included: 1 x GPS HUD Digital Speedometer 1 x USB Cable