G4 & G4S GPS HUD Car LED Head Up Display Smart Digital Alarm Reminder Speedometer GPS HUD Car Accessories For All CarsTips:HUD Drive: The best head-up display for any car 1Head-up display (HUD) for everyday commute to stay focused and connected while driving2Installed 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. For all models, the connection is a USB interface.5v The original car is not damaged, the smart is started to stop with the carHUD works: Receive the data from the car and display it on the machine.What is the difference between G4 and G4S?Usually, users prefer to buy a machine with G4 ambient light, which has a good-looking picture and many functions. G4S mainly displays a simple mode: the function of speed + time.---The G4 machine chip uses the latest upgraded hardware, so the G4 will position the satellite faster than the G4S based on GPS.G4 Function:1peed2riving direction guide35 color mood lights4Simple mode display5Ambient light acceleration display6ne-key switch between kilometers and miles7: Automatic photoreceptorCall the police:1 Overspeed alarm2 Fatigue driving reminder G4S Function:1: Vehicle speed2: Time3: Driving directionCall the police:1: Overspeed alarm2: Fatigue driving reminderAlarm functions Improve driving safety1Overspeed alarmAlarm when the vehicle speed reaches the set default value of 150KM/H (30- 250 setting) 2Fatigue driving: Reminder after continuous driving exceeds the default value of 4.0 hours 1-8h settingG4S Function G4 FunctionCan be placed in any cornerAny car can be used Can be used with USB (5v).One USB cable, plug and play. Perfectly compatible with vans trucks,buses carsoff-road vehicles suvsand other vehiclesG4S G4