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ENM is proud to present the new series PT15 self-powered digital tach/maintenance/hour meter. The PT15 keeps track of 1 engine RPM and running time for all types of gasoline engines. The unit is powered by an internal lithium battery. No external power connections are required. The Operation of the tach/hour meter is triggered by 5.5 ft. shielded and external lead, wrapped around the spark plug wire of the engine since the unit is triggered by the spark of the engine, the hours and the RPM display actual operation. This is useful for maintenance and warranty applications for any type of engine powered machinery.