About this item 1.OBD2+GPS System 2 in 1 ?C This car head up display has dual OBD2 & GPS dual system. GPS functions can be displayed simultaneously at OBD mode.The system is more stable and smooth. data is more abundant. 2.Driving Safely ?CLots driving data can be displayed on this car HUD display: Speed.RPM.Water Temperature.Voltage.Fuel Consumption.Driving Distance. Driving Time.With the head up display.you can always keep your view on the road without looking the dashboard. There are 9 kinds display interface can free switch as you want. 3.Alarm?CThis car HUD device has a detection for error code and make a alarm.such as low voltage alarm.high water temperature alarm.over speed alarm. fatigue driving reminder. RPM alarm. engine fault code alarm.and eliminate the fault code.These reminders help you avoid the accidents to keep the car in good condition. keep your driving safely. Upgrade Screen Resolution. Satellite Time.2 kinds installation way: put on dashboard or stick to windshield. the bracket can be rotated in all direction to adjust the visual angel and height. Ambient Light – When driving normally. the ambient light is blue color(automatically adjusts the brightness according to the environment). when driving abnormally such as speeding. the ambient light will change to red color for alarming. make your journey more safe.Heads Up Display. Heads Up Display for Car HUD Display OBD2 GPS Dual System for All Cars. Shows Speed RPM