M22 Car Electronic Dog HUD Head-up Display Car OBD Universal Speedometer 1. Built-in GPS + electronic dog, real voice, original sound broadcast 2. 300 meters in advance speed warning, fixed speed broadcast in advance 3. 360-degree speed measurement without blind spots, so that speed measurement has nowhere to hide 4. High-performance processing chip, super performance and compatibility, dual running memory and dual-core processor to ensure smooth high-speed operation 5. Multiple interfaces can be switched at will to meet your different data 6. The integrated design of the sunshade blocks the excess light of the head-up display, so that driving at night is not dazzling 7. Automatically start and shut down with the car starting and shutting down 8. The machine automatically upgrades the electronic eye service through the computer connected to the server 9. Use car USB (5V) or cigarette lighter to USB power supply, and completely cut off the power when the car is turned off, and there is no stealing of electricity 10. Plug and play, suitable for all models 11. Material: ABS+PC 12. Screen type: LED 13. Screen size: 3.5 inches 14. Product size: about 95 x 50 x 30mm 15. This product is measured manually, and there may be an error of 0.1-0.2mm and 0.1-0.2g in length and weight; there may be a slight color difference due to display and light problems. Please refer to the actual product! Packing list: -Head-up screen x 1 -Reflective film x 1 -USB cable x 1 -Anti-slip pad x 1 -Instruction manual x 1