Engine Tachometer Digital Tachometer / Hour Meter for 2 & 4 Stroke Spark Small Gas Engines Motors For Motorcycle ATV UTV cropper Chain SawFeature:1.Low voltage design with long lifetime up to 2~3 years.2.Easy to install,saving cost and space.3.Programmable maintenance interval setting.4.Wide operating temperature range, suitable for all motorcycles with 2 stroke or 4 stroke gas engines.5.Show engine rpm and record hours of operation.6.Inductive design: You just need to tie the cable to the spark plugs.Note: press the S1 and S2 button at the same time about 4 seconds to start upSpecification:1.Power: 1 x CR2450 Battery, 3.0V/0.1W2.Battery Life: 2~3 Years3.Resolution: 0.1HRS/10RPMs4.Reading: 9999.9Hrs / 99999RPMs5.Operating Temperature: Standard -30 ~ 85CPackage Included:1 x Tach/Hour Meter with WireShow engine rpm and record hours of operationLow voltage design with long lifetime up to 2~3 yearsInductive design: You just need to tie the cable to the spark plugs