This measures engine rpm, maximum rpm, total cumulative operating time, and resettable cumulative operating time. This has a dual-display system for either current rpm alone or current & maximum rpm and also has two maximum rpm memories for comparison.

For 2-stroke engines 1 to 4 cylinder applications.
For 4-stroke engines 1 to 6 and 8 cylinder applications.

*This unit is not compatible with diesel engines and direct ignition applications. Made in Japan.