Car OBDII Speedometer Head-up Display B1 Multi-Functions Car Diagnostic Detector Speedometer Safe Driving

Features:
6 Major Function Switching: Speed, Fuel consumption, acceleration time per 100 km,voltage, water temperature，current mileage.
Five Alarm Functions: Overspeed alarm, RPM alarm, low voltage alarm, water temperature alarm,fatigue driving reminder.
Hardware Upgrade:Using low-power chips, non-destructive repetition to completely solve the problem of high power consumption! Intelligent switch, start and close with the car.
Brightness Upgrade:It can be clearly displayed even when driving in the sun during the day.
Software Upgrade:Add speed lubrication effect, no jump speed, more consistent and smooth display, and increase the compatibility of starting and stopping, hybrid vehicles, and gasoline vehicles.
Auto-sensitivity Mode: Equipped with photosensitive elements, the brightness of the display is automatically adjusted according to the intensity of external light, so that it is clearly visible under strong light.
Automatic Switch: Automatically turn on and off as the car starts and stops.