FUNCTION 1.Speed Icon 2.Overspeed Icon 3.Speed Unit: Km/H or MPH 4.Speed Display Area 5.Compass: N (north) E (east) W (west) S (south) [The product can only be used normally after the satellite is found] 6.Atmosphere Light 7.Multi-function Display Area: Altitude/ System Time/Driving Time 8.Multi-function Display Area: Driving Angle/Acceleration Time/Driving Distance 9.Satellite Number Icon: After the product is successfully connected to the satellite and displayed a number, the icon stops flashing, and it can be used normally 9 kinds interface ,free switch For all models, the connection is a USB interface.5v The original car is not damaged, the smart is started to stop with the car HUD works: Receive the data from the car and display it on the machine. Alarm functions Improve driving safety 1Overspeed alarmAlarm when the vehicle speed reaches the set default value .(0- 250 setting) 2Fatigue driving: Reminder after continuous driving exceeds the default value of 8.0 hour.1-8h setting 2 kinds install more easy for use HUD size parameters Tips: HUD Drive: The best head-up display for any car 1Head-up display (HUD) for everyday commute to stay focused and connected while driving 2Installed on the dashboard at one time, the cables are concealed, and the appearance is the same as the original car, The machine does not damage the car, and use safe.