Runleader RL-HM010 DC AC hour meter with digital LCD display for Boat Tractor Generator Engine Mower Fork Light CAT Paramotors Microlights Marine Engines Cleaners and Chainsaws (DC4.5-90V) Counter Voltage supply:DC4.5-90V Hour Meter Max Hours:99999.9 Accumulating total running hours TOT,toal time resettable RESET Resolution 0.1 hour Easy installation, long lifetime,have got CE and ROHS certification