Head-up display for car with speedometer and OBD diagnostic1、8 Major Display Switching: Vehicle speed/fuel consumption/acceleration time/water temperature/voltage/driving distance/driving time/Beijing time. 2、6 Alarm Functions: Overspeed alarm, RPM alarm, voltage alarm, water temperature alarm,fatigue driving alarm, fault code alarm. 3、Compact body, suitable for placement. No matter where it is placed, it is clear and natural, without blocking any line of sight. 4、The time can be automatically switched in combination with the speed of the vehicle, the speed is displayed when driving, and the time is displayed when waiting for traffic lights. 5、Hardware Upgrade:Using low-power chips, lossless standby completely solves the problem of high power consumption.Intelligent switch, start and close with the car.