Car tachometer gauge, 2in LCD display 3000 rpm tachometer for car motorcycle engineering machinery outboard motor.

Specification:
Item Type: Tachometer
Material: Aluminum + ABS
Application: Suitable for automobiles, outboard motors, engineering machinery, and motorcycles
Wiring:
Black Wire: Negative (-) power supply
Red Wire: 9-30V
Blue Wire: RPM signal
Yellow Wire: Backlight
White Wire: Adjustment
Operating Instructions:
1. The white wire touches the negative terminal for 3 seconds to enter gear ratio adjustment mode. If you leave the negative terminal touched for more than 3 seconds, it will exit adjustment mode.
2. When the white wire touches the negative terminal, the value continues to increase; when the white wire is released and touches the negative terminal, the value continues to decrease. The more often the white wire touches the negative terminal, the faster the value counts. The minimum counting step value is 0.1, and the adjustable range is from 1.0 to 360. 3. After adjusting the speed ratio to meet your needs, the white line will leave the negative terminal. 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