H400G Car 3.5 inch GPS Mode HUD Head-up Display Support Speed Time Distance Display 1. Using 10 Hz high refresh rate GPS + Beidou dual-mode chip, the refresh rate is 10 frames per second. The vehicle speed refreshes quickly without delay. 2. Using car USB (5V) or cigarette lighter to USB power supply, truly zero power consumption. USB or cigarette lighter is a short power, the car is turned off and the power is cut off, there is no the phenomenon of power stealing, and OBD is a long power. 3. Add the speed calibration function, which can be adjusted to be consistent with the car dashboard display. 4. A variety of interfaces can be switched at will to meet different needs. 5. Self-adaptive light-sensing, large light hole, brightness changes naturally with the environment. 6. Function: reflection imaging, no film and no ghosting. Speed, time, driving distance, altitude, number of satellites, mile switching, display mode selection, support for hybrid power, automatic start and stop.