Features:-HUD (Head-Up Display) projects driving data without requiring drivers to look away from their usual viewpoints-HUD automatically adjusts its brightness level， so its projections are clearly visible in direct sunlight or at night.-Alerts you if you exceed the speed limit by setting Over-speed buzzing alarm-Projects a lot of driving information onto a transparent film on your windshield， such as speed， over speed alarm， engine rpm， water temperature， instant fuel consumption， average fuel consumption， mileage， low fuel capacity alarm， engine failure alarm， etc.-5.5 inch LCD display， portable and easy for drivers to read data-New high brightness screen， bright colors， image is clear and fine-Detect all the important driving information via the OBD II system-Plug and play design， easy installationSpecification:Type: Head up display W02Display type: DigitalCar Make: Cars with OBD II InterfaceProduct Size: (5.9 x 3.35 x 0.55)" / (15 x 8.5 x 1.4) cm (L x W x H)Screen Size: 5.5 inchEnvironment: ~40c+80c atmospheric pressure 86-106kpaAlarm sound level: >>=30dbWorking voltage: DC9-16VWorking current: 40mASleeping current: 15mACompass precision: ��1��Speed range: 0-400KMPackage Include:1x OBD II Head up display1x OBD Cable1x Non-slip Mat1x Reflecting Film1�� User Manual