Seller notes

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. Its 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 afte...

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