Specification:
Item Type: Tachometer
Material: AlumInium Alloy+ABS
Diameter: Approx. 52mm/2in
Fitment: For Automobile, outboard engine, construction machinery, motorcycle
Connection Mode:
Black: Power negative (-)
Red: 9-30 VDC
Blue: RPM signal
Yellow: Backlit
White: Adjustment

Instruction:
1. The white line touches the negative pole for 3 seconds to enter the setting speed ratio mode.If you leave the negative pole for more than 3 seconds,it will exit the setting mode.
2. When the white wire touches the negative pole,the value keeps increasing ;when the white wire is loosened and touches the negative pole,the value keeps decreasing.The longer the white line touches the negative pole,the faster teh value counts.The minimum step value of counting is 0.1,the adjustable range is 1.0-360.
3. After adjusting the speed ratio to meet your requirements,the white line leaves the negative pole.After 3 seconds,the tachometer will automatically save the result you set.If the settings do not meet your requirements,reset them.

Package List:
1 x Tachometer 1 x Manual