Fangrui Product Details : 1. Plug -in And Games: After Connecting To The Power Supply, The Display Of The Car Hud Head Can Work Directly Without Any Other Operation. No Jump Speed, More Coherent And Smooth Display. 2. Automatically Adjust The Brightness, More Intelligent. 3. 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. 4. Widely Used: Built -in Gps Chip, Car Hud Head Display Is Suitable For All Cars, Bus, Trucks, Bicycles, Motorcycles. Tips: The Product May Be Updated Constantly ,due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Material: Abs Color: As Shown Package Contents: 1 X Car Digital Speedometer 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 Diffe