A2 HUD 3.5 inch HD GPS Car Head Up Display, Speed & Over Speed Alarm, Compass, Freely Switch Between Kilometers and Miles(Black)

HUD HUD short for Head Up Display. It displays driving datas on the front windshield such as speed on the car front window glass; Avoiding drivers unsafety because of watching the instrument while driving. Drivers can read the driving information instantly , and can always keep the best state on the way with HUD. Features 1. Available for any car, easy to install, plug and play. 2. Screen 3.5 inch HD display. 3. Multi-color design makes the screen more abundant and easier to read. 4. Nano-technology to eliminate double reflections,more clear. 5. Rich Contents: Speed, compass, speed alarm, free switch between km and miles. 6. Auto power on/off: HUD start and off with vehicle started and shutdown, effective protection of the car battery; Retaining the manual switch mode, more easy to control HUD. 7. Automatic and manual brightness adjustment mode,driving without glare. Solution for Common Problems 1. HUD screen without any display,and no power - Check the car charger cable if it is tight, pull down repeatedly inserted multiple times, check the HUD switch if it powers on. If there still no display please try another car to test and analyze whether the car cigarette lighter interface is bad, if it is a bad cigarette lighter, please try to connect the cable line to the car battery. 2. No speed ,auto powers off after 5 minutes. - The default auto powers off time is 5 minutes, if there is no speed, HUD will power off after 5 minutes,it built-in vibration switch, as long as there is a slight vibration it will powers on. 3. Inaccurate Speed - When HUD is power on,vertical press the wave button 5 seconds to enter into the menu options, here menu options shows 0,parameter shows 107,up or down the wave button to increase or decrease the value according to the difference until it shows correct one.After adjustment, vertical press in 5 seconds to save it. 4. HUD see not clearly under the sunlight. - Check whether the HUD host protective film is torn,and please stick the reflection film on the windscreen. 5. Wrong operation lead to crashes. Or inaccurate datas - Do a reset setting.