Feature: 1. Plug & Play: After connecting to the power supply, car HUD head up display can work directly without any other operations. No skip speed, more coherent and smooth display. 2. Large fonts are clearly visible during the day and night. 3. Automatically adjust the brightness, more intelligent. 4. Note: This device is a GPS digital speed table, which is collected from satellite. Therefore, if you test at home or underground parking lots, you may not be able to display the speed correctly. Please test on the roadside. 5. Widely used: built -in GPS chip, car HUD head display is suitable for all cars, bus, trucks, bicycles, motorcycles. Specifications Output Frequency:Car Digital Speedometer Rated Power:5V Material: ABS Color: As shown Specifications:KM/H Tips: The product may be updated constantly, The Actual Product May Have Slight Differences Or Color Differences the color and appearance may be changed, please don't mind. And take a consideration before place the order if you have request for color or appearance. Package Contents: 1 x Head-up Display Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.