Faria Beede Instruments 2" Hourmeter 10000 Hrs 12-32 VDC Kronos. 0625" (53mm) Hourmeter operates by applying battery voltage across the gauges's register motor to ground. The register increments increase when the key switch in on. Route power through a normally open Oil Pressure switch to count "engine running" hours. Benefits: 0-10000 Hours Engine Running only Specifications for Faria Beede Instruments Kronos 2" Hourmeter 10000 Hrs 12-32 VDC: Manufacturer: Faria Beede Instruments Color: Black Features of Faria Beede Instruments Kronos 2" Hourmeter 10000 Hrs 12-32 VDC 0-10000 (99999 Digital) Hours Engine Running only 2" - Hole size: 2.0625" (53mm) Designed for quick and simple installation Package Contents: Faria Beede Instruments Kronos 2" Hourmeter 10000 Hrs 12-32 VDC Faria Beede Instruments 19020: 2" Hourmeter 10000 Hrs 12-32 VDC Kronos