Hour Meter, Display Type Electromechanical, Time Range 0 to 99999.9, Bezel Face Size 2.70 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/Tenths, Bezel To Back Length 2.69 in, Ambient Temp. Range 5 Degrees to 122 Degrees F, Material of Construction Polycarbonate, Input Type Electrical, Reset Type No Reset, Temp. Range 5 Degrees to 122 Degrees F, Fits 2.22 in dia Opening