BTeleflex Hobbs Hour Meter 12-24 volt DC Quartz 5699485024 ReviewbP PP Teleflex Hobbs Hour Meter 12-24 volt DC Quartz 5699485024 P12-24 Volt DC (32 Volt DC Max)PFlange mount: 2.11" (W) x 1.23" (H) mounting holes are ~ 1.75" center to center.PMaximum time range: 9999.