Displays driving data such as speed, revs, fuel consumption, water temperature and voltage on the front windscreen, avoiding the driver's insecurity caused by looking at the instruments while driving. The driver can read driving information in real time, keeping the HUD in the condition at all times. This product is a dual system: select the language you are familiar with after switching on, select the OBD or GPS system, and automatically enter the last system after 5 seconds of no operation. 11 major interface functions can be switched at will. A of operating interface modes and colours can be freely switched, bringing you more fun and a sense of technology. Operating voltage: 11V~18Vdc (12Vdc/200mA) Light-sensitive element: automatically adjusts brightness with changes in the surrounding environment Language: CN Simplified Chinese / Traditional Chinese / EN English etc. Setting mode: System sound setting. Alarm sound on / Alarm sound off Over speed alert: Alarm when the vehicle speed reaches the set default value of 150km/h, set range is 5-200km/h Engine temperature alarm: Alarm when the water temperature reaches the set default value of 120C, the setting range is 50-200 Engine speed alarm: alarm when the speed reaches the default value of 6000r/min, the setting range is 1000-8000 Voltage alarm setting: alarm when the voltage falls the set default value of 10.5v, the setting range is 10.0-15.0v Speed error adjustment: when the car speed has error with the instrument panel, adjust the parameter value (for example, the instrument shows 100Km/h, the device shows 105Km/h, turn the dial upwards to adjust the parameter value to 102) color:Black Material:plastic Package Contents: 1 set x HUD with accessories Only the above package content, other products are not included. Note: Light reflection 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.