[Simple Display]Vehicle Speed + Engine RPM, HD Display, practical function, let you drive more comfortable for a long time. (plug and play -- Available for 95% car with an OBD2/ GPS interface) The Nano - Technology - High clearness projector, to eliminate unwanted reflections and can make the display information more . The Automatic and manual brightness adjustment mode, and more easy to control the HUD. [Multiple functions]: Ambient decorative lighting Engine RPM Fault code alarm Fatigue driving alarm .The Alarm Light sensor: HUD can automatically adjust the brightness "according to the environment .Speed unit: KM/H, MPH .Multi-function zone: speed,water temperature,battery voltage,driving distance Water temperature ,voltage . [Compatible Attention]OBDll only be available for vehicles produced after 2008. GPS MODEL Perfect Suitable for All Vehicle. ( If your car is not compatible with OBD mode, please use GPS mode.)Dual System, Change free.OBDll mode is not compatible with hybrid electric vehicle,-car, pickup truck, RV, computer modified car,it is recommended to use the GPS mode. [What is HUD?] Short for Up Display. It displays driving data on the front windshield such as speed,RPM,water temperature,voltage single mileage etc. HUD avoids the danger of drivers looking down at the dashboard. It ensures the safety of drivers because of watching the data on the car front window glass, and helps drivers to keep the state . A of operating interface modes and colors can be switched freely, It will bring more fun and Technological sense to you. It's a very good reminder,and will improve the safety of driving. Because It will rise beep beep voice for couple seconds when over the speed that you had set (default speed:150km/h) 1.Environment temperature: - 40 C- +120 C Barometric press: 86-106KPa Relative humidity:10%-95% Environment voice: less than 60dB 2.Work voltage:11V~18Vdc(12Vdc/200mA) 3.Sleep current: less than 30mA 4.Display way:Virtual image reflection 5.Display channel:LED Display 6.Reflector transmittance:98% Speed Data Display Error: Because the system is designed to warn drivers not to overspeed.Therefore,the HUD's default display speed is 5-10 km/h higher than the actual driving speed of the car. You can adjust the data to be synchronized when using. For example,the meter displays 100 KM/The device displays 105 KM/Set the default value from 107 to 102.After saving the settings,there is no need to adjust again in . ATTENTION: 1.Please tear off the protective film before using this product, otherwise it will affect the clarity of the projection. 2.Because the car's glass is double glazed,the device will have slight ghosting, but it will not affect the use. If the reflective film (contained in the package) is used,the slight ghosting will not occur. 3.Shutdown voltage setting:Adjust to 13.2V or higher when it cannot be turned off. Color: black Material: ABS+PC Size: 9*6*3cm Package Contents: 1 * HUD 1 * Cable for OBD 1 * USB cable 1 * Reflective Film 1 * English User Manua 1 * Non-slip mat Only the above package content, other products are not included. Note: Light 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.