Hour Meter, Display Type Electromechanical, Time Range 0 to 9999.99, Bezel Face Size 3.50 in dia, Bezel Face Shape Round, Bezel Face Type Flange Mount, Elapsed Time To 9,999.99, Operating Voltage 120V AC, Hz 60 Hz, Number of Digits 6, Display Units Hours, Bezel To Back Length 2.69 in, Depth 2.69 in, Width 2.2 in, Ambient Temp. Range -13 Degrees to 185 Degrees F, NEMA Rating 1, Material of Construction Polycarbonate, Input Type Electrical, Reset Type Push Button