Backlit Upgraded Tach Maintenance RPM Hour Meter Tachometer Searon for RC Toys PWC ATV Motorcycles Marine Engines Chain Saws Tractors Lawnmowers2019 New Upgraded Tach Maintenance RPM Hour Meter Tachometer for RC Toys PWC ATV Motorcycles Marine Engines Chain Saws Tractors Lawnmowers Accumulate TOT(Total Hours), Record JOB (JOB hours). Programmable Maintenance Interval Time Read RPM when Engine is ON, Recall Max RPM, Programmable RPM Alert. with RED Backlit lighting Internal Replaceable CR2032 Battery and Data(Total Hours) Retained after Battery Change. On OFF Switch: On TOT Total Hours Mode,