Description: It can work on any 2 or 4 stroke gas engine up to 8 cylinders. It has a powerful Temp system, RPM measuring system, timing system, as well as some other unique function design. Temp Measuring System Including:measuring current temperature, MAX Temp & setting over temperature warning function, temperature unit display can be set by user, temperature sensor type can be select by user, etc.RPM Measuring System Including: measuring current engine RPM, recording & viewing engine MAX RPM, & setting overspeed warning function, RPM refresh rate 0.5S, etc. Timing System Including: accumulating total running hours TOT, recording partial running time JOB, maintenance timer can be set freely to 0-200 hours SVC, etc. Unique Design Including: easy installed, save all data aumatically, waterproof Rate IP67, etc. In addition, the products have got CE & ROHS certification. It has a patent both in China. This unit works on 2 or 4 stroke gasoline engine. This meter has a Temperature function, Tachometer, Hour Meter Feature & some other unique Features.RPM Features Display RPMs when engine is running. Tachometer from 0-19, 990 RPM with Max RPM Recall & RPM alert function, the RPM resolution is 10 RPM. Resettable warning RPMs from 1000-19990 RPMs with RED LED flashes alert service alarms. The default alert service alarms value is 8500 RPMs.RPM refresh rate 0.5 Second. Hours Features Accumulating total running hours (TOT). Non-resettable total hours from 0-19, 999.9 hours, the resolution is