Features: Display the driving data such as speed, speed, fuel-consumption, water temperature, voltages, etc. on the front windshield to avoid the insecurity caused by the driver looking at the instrument while driving. The driver can read the driving information in real-time and keep the HUD in the best-condition at any-time. This product is a dual system: after power on, choose the language you are familiar with, choose the OBD or GPS system, and automatically enter the last selected system after 5 seconds of no operation. 11 large interface-functions, you can switch at will. A variety of operating interface-modes and colors can be switched freely, bringing you more fun and a sense of technology. Photosensitive components: automatically adjust the brightness with the surrounding environment. Specifications: Material:ABS Size:Approx.11.5x8.2x2.8cm/4.52x3.22x1.1inch Color:Black Model: P21 Applicable models: universal Screen type: LCD Screen size: 3.5inch Resolution: High-Definition Compatibility: strong Input signal: OBD2 Picture tube: TFT Working voltage: 11V~18Vdc (12Vdc/200mA) Note: .Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. .Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x HUD Head Up Display