RL-HM016R Digital resettable inductive Tach/Hour meter. It can work on most 2 or 4 stroke gas engine.It has a powerful timing system, RPM measuring system as well as some other function design.Timing System Including: accumulating total running hours TOT, recording partial running time PAr,Partial timer is resettable, etc.RPM Measuring System Including:measuring current engine RPM,recording MAX RPM 5s after engine stopped, RPM refresh rate 1S ,etc Design Including: easy installed,waterproof Rate IP68,etc.1.This tach hour meter record gasoline engines total running hours and partial time by the induction from spark plug cable.2.The hour meter shows total hours and partial time accumulated. Partial timing can be viewed and reset .3.The tach hour meter shows current RPMs and total running hours when the engine is running. RPM accuracy is 10RPM.4.Compared with the tachometer with pointer, it displays RPM more accurate.5.Whats more outstanding is that the tach hour meter can display engines MAX RPM within once working period 5s after engine stopped.Product Name: TachometerTiming Range: 0-99999HSpeed Range: 0-30000RPMRefresh Rate: 0.5SBattery Type: CR2050Waterproof Grade: IP68Product Model: RL-HMO16RTiming Accuracy: 0.1/1HSpeed Accuracy: 10RPMDisplay Mode: LCDInductive Line Length: 1.1mScope of Application: Motorcycle, kart, motorboat, ATV, lawn mower, rice transplanter, paraglider, generator, outboard motorColour:BlackMaterial:ABSPackage Contents:1 x Speed Hour Meter 1 Cord 2 x Cable TiesOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.