Features: Used to measure the RPM of automobile engine. Measurement range is 0~8000RPM. High accuracy and easy operation. Works on 4, 6, and 8 cylinder engines. Adjustable shift light on face.
Note: 1. It's normal the pointer is not zero in the absence of installation. After power-on, the product will check and adjust the pointer by itself. 2. If the product pointer is still not zero after power-on, can start normally, when the pointer is above zero, it can be restarted to adjust the pointer after power-off.