Specifications: Condition: New Name: Car HUD Speedometer Monitor Material: ABS + PC Color: Black Size: About 80*54*31mm Display mode: Metric (Km/h), English System (mph) Features: Plug and Play: After connect power supply, it will work directly, no need any other operation. No Skip Speed: No skip speed, more coherent and smooth display; GPS+Beidou Dual Chips: Speed is very accurate, and the speed is refreshed quickly without any delay; Innovative Design: with sunshine hood itself, good review even under sun; Large Font: Clearly visible both during the day and at night; Wide Application: Built-in GPS Chips, suitable for all cars, buses, trucks, bikes, scooters. Packing list: 1x HUD Speedometer Monitor 1 x Usb Cable Plug Type: CN plug Voltage: 6V Ower supply: USB Power: 5W Notice: The Device is GPS Digital Speedometer, and speed is collected from satellites. So if tested at home or parking lot, perhaps speed can not display correctly. Please test it on the car outside with good signal.