Inductive Tach/Hour Meter — This digital Tach Hour Meter Tachometer will keep track of engine RPMs and running time for RC Toys, PWC, ATV, Motorcycles, Marine Engines, Chain Saws, Tractors, Lawnmowers and Gas Powered Engines. Read RPM — Read RPM when engine is started. When engine is off, display total run time of engine and remains visible; Maximum RPM Recall; RPM Capacity: 25,000 RPM Accumulate Total Hours — Accumulate Non-resettable total run time of operation, Total time reads up to 999,99 Hours Works With — 4 Stroke 1 Cylinder / 4 Stroke 2 Cylinder / 4 Stroke 4 Cylinder / 4 Stroke 6 Cylinder / 4 Stroke 8 Cylinder / 4 Stroke 12 Cylinder / 4 Stroke 16 Cylinder / 2 Stroke 1 Cylinder / 2 Stroke 2 Cylinder / 2 Stroke 3 Cylinder / 2 Stroke 4 Cylinder/ 2 Stroke 6 Cylinder Gas Powered Engines 2-Year Warranty — Searon warrants that for a period of 2 YEARS from time of purchase. within 2 years, any issue with this Generator hour meter Tachometer Inductive, it will be full refund without return, as long as you contact us timely.