Introduction:  Car OBD2 Gauge,which can display the car driving speed,driving direction,clock,mileage,trip time etc, and keep the driver eyes always on road to avoid the dangerous of lowering down head to read the dashboard.     Key functions:  1 Setting button/wave button: can pull it left,pull right, short press in,long press in.  2 Light sensor.  3 USB upgrade port.  4 OBD port (connects the car with OBD2 cable).  5 Reserved port (no function).     Setting button/wave button functions:  1 Short press in (quick press in the button and release within 1 second): (1) to switch the display mode.  (2) to choose menu after entering the setup menu.  2 Long press in(press in the button more than 2 seconds and release): (1) to enter the setting menu.  (2) to save and exit after setting.  3 Pull left: (1)  to switch the functions in the left area.  (2)  to change the setting options.  4 Pull right: (1)  to switch the functions in the right area.  (2)  to change the setting options.    Below are the functions abbreviations : ECT - Engine Coolant Temperature VLT - Voltage: FUE - Fuel Consumption.  RPM - Revolutions Per Minute TIM - Clock: MIN-Driving time.  DIS - Driving Distance MAP - Intake Pressure: OIT - Oil Temperature.  A/F -  Air-fuel Ratio  TCP - Turbine Pressure: PSI - Intake pressure.           Setting Mode(Menu mode)  -Long press in to enter into the setting mode,pull right to choose the menu,and short press in to confirm.Once finishing the setting,long press in to exit.  -Language Set: Please choose your familiar language ( EN-English / CN-Simplified Chinese/ TW-Traditional Chinese) -Sound Switch: turn on/off the buzzer.  -Speed Alarm: the default value is 150 (the default value can be changed,pull down is to decrease,pull up is to increase, adjust range is 5-200km/h).  -Coolant alarm: default value is 120°, it means this device will give alarm when Coolant temperature is over 120°(adjust range is 50-200).  -RPM alarm: default value is 6000 r, it means this device will give alarm when RPM over 6000 r(adjust range is 1000-8000) -BAT Alarm: default value is 10.5V, it means this device will give alarm when battery voltage is lower than 10.5V(adjust range is 10.0-15.0V) .  -Speed Adjust: adjust the speed according to the dashboard,default value is 107%(if the speed is different with the dashboard, then can adjust the value. For example, if the dashboard speed is 100Km/h, and the device speed is 105KM/h, then please adjust the value to 102) .  -Speed Offset: When the vehicle turns off,but the device speed is not 0, then adjust the device Speed Offset value (if the device speed shows 5KM/H, then change the device Speed Offset default value at 5).  -BAT Adjust:if the battery voltage is different with the vehicle,it can be adjusted.  (if the device voltage is 0.2V higher than the dashboard’s,please change the value to 98%) . -Engine Size: if the fuel consumption is much different with the dashboard,please change it as the Displacement size(for example, if the vehicle displacement is 3.6L, please change the default value to 3.6L) . -Fuel adjust: default value is 100%,it can be adjusted when the fuel consumption is different with the dashboard.