WiiYii M4 Cyberpunk Design Car Head up Display (HUD) Smart OBD Speedometer with Over-Speed Alarm Compatible with Most Cars
Item No.: M4
Driiving Speed(km/mile),over speed alarm,
water temperature(°C,°F), water temperaturer alarm,
battery voltage,voltage alarm,
new function:can choose OBD2 protocol
manual or auto adjust the brightness, alarm sound switch, auto pwer on/off
