Note: The reasons for the slow speed of satellite search: In garages, overpasses, and dense buildings, the speed of satellite search will be affected; When the same GPS device is installed in your car, it can also affect the search satellite speed of the product, which means that the two GPS devices cannot be placed together; When there is a metal film on your car, it can also affect the search satellite speed of the product. You can drive the car to an open area and place the product outside the window for satellite search. M1 hudM1 is a GPS mode head up display. Unlike most head up displays on the market, our designers have fully utilized the characteristics of the windshield to create a simple white windshield HUD, which is easy to install and plug and play.Design conceptThe M1's screen design is very simple, the data projected onto the windshield cannot be too complicated, otherwise it will block the driver's view. So we designed it as a very simple speedometer, presenting only the most important data of speed in front of the driver's eyes, at a glance, simple and clear.Instructions for useOur product is easy to install, plug and play, just use the usb cable included inside the product to connect the car and the product, start the engine to power on and use. When you find the small icon on the product is flashing constantly, it means the product is collecting satellites, and the speed will be displayed only when the device searches for satellites.Main functionsM1 displays speed, with speeding alarm and fatigue warning function, GPS compass shows direction. Speed is available in MPH and KM/H units, which can be adjusted in the setting. When there is over speed or continuous driving for too long, the product will emit a beeping sound to remind the driver, which is like a safety supervisor, always remind the driver to pay attention to driving safety, placing a mini M1 HUD inside the car will definitely add a lot of fun.After-sales serviceOur products have passed two inspections by the quality inspection department before leaving the factory, all products encountered unresolved problems within one year, any questions about the product, you can directly mail us, we will provide you with better after-sales service!Automated BrightnessThe product is embedded with advanced light-sensitive elements, which can change according to the brightness. When the light is strong during the day, the product will automatically brighten, on the contrary, when the light is weak at night, the brightness of the product will also automatically become dark.You can also manually adjust the brightness of the product.