Hour Meter, Display Type Electromechanical, Time Range 0 to 99999.9, Bezel Face Size 2.24 in dia, Bezel Face Shape Round, Bezel Face Type Flush Mount, Elapsed Time To 99,999.9, Operating Voltage 90 - 264V AC, Hz 50/60 Hz, Number of Digits 6, Display Units Hours/Tenths, Bezel To Back Length 1.5 in, Ambient Temp. Range -40 Degrees to 185 Degrees F, Material of Construction Black Polymer, Reset Type Non Resettable, Temp. Range -40 Degrees to 185 Degrees F, Fits 2.0 in dia Panel Opening