G4 Head-Up Display LED G4S Speedometer Smart Digital Alarm Reminder HUD GPS For Car Accessories on-board computer car 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. 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. 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: 1 speed 2driving direction guide 3 5 color mood lights 4 Simple mode display 5 Ambient light acceleration display 6: One-key switch between kilometers and miles 7: Automatic photoreceptor Call the police: 1 Overspeed alarm 2 Fatigue driving reminder G4S Function: 1: Vehicle speed 2: Time Call the police: 1: Overspeed alarm 2: Fatigue driving reminder Alarm functions Improve driving safety 1Overspeed 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 setting G4S FUNCTION G4 FUNCTION Multiple placements Any 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 vehicle Non-destructive installation,Plug and play 1Plug the USB cable into the cigarette lighter interface 2The wire is inserted into the A-pillar seal 3Connect the USB side to the UHD put in the right place Automatic brightness, switch with engine 1Satellite icon: After the satellite is found,the GPS light stops flashing and stays on for normal use. 2Vehicle speed display 3Ambient light: speed changes over 20 4Compass: N (North) E (East) W (West) S (South) 5Speed unit: KM/H (kilometers) MPH (miles)