Searon Backlit Digital Resettable Inductive Tacho Hour Meter Tachometer For Motorcycle Marine Boat ATV Snowmobile Generator Mower Backlit Tach Maintenance Hour Meter Tachometer for for RC Toys PWC ATV Motorcycles Marine Engines Chain Saws Tractors Lawnmowers... Accumulate total run time (TOT:0~99,999 hours), Record re-settable JOB time(JOB: 0~99,99.9 hours). Programmable Maintenance Interval Timer(SVC) from 0 to 200 hours with flash alert service alarms RPM reading Displays from 0 to 25,000 RPM with 10 RPM resolution.Max RPM recall. Internal replaceable CR2032 battery and Data will retain after replace the battery. 2 Years Warranty