BRavTech(TM) DC 6V-50V Hour Meter Hourmeter Tachometer Gauge for Boat Car Truck Engine Rectangular Auto Accessories Part Replacement ReviewbP PP RavTech(TM) DC 6V-50V Hour Meter Hourmeter Tachometer Gauge for Boat Car Truck Engine Rectangular Auto Accessories Part Replacement P100 Brand New and High Quality.PThe timer operates on in put voltages from 5 to 60 Volts DC.PThe meter has a positive and a negative lead for easy installation.P6 digit display, from 110 hour to 99999.9.