Hour Meter, Display Type Electromechanical, Time Range 0 to 99999.9, Bezel Face Size 1.89 in x 1.89 in, Bezel Face Shape Square, Bezel Face Type Square Flush Mount, Elapsed Time To 99,999.9, Operating Voltage 115V AC, Hz 60 Hz, Number of Digits 6, Display Units Hours/Tenths, Bezel To Back Length 1.6 in, Depth 1.35 in, Length 2.2 in, Width 2.05 in, Ambient Temp. Range -22 Degrees to 158 Degrees F, Material of Construction Black Polymer, Input Type Electrical, Reset Type Non Resettable