Hour Meter, Display Type Electromechanical, Time Range 0 to 99999.9, Bezel Face Size 2.33 in dia, Bezel Face Shape Round, Bezel Face Type Flush Mount, Elapsed Time To 99,999.9, Operating Voltage 120 to 240V 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, NEMA Rating 12, 4X, Material of Construction Lexan, Input Type Electrical, Reset Type No Reset, Temp. Range -40 Degrees to 185 Degrees F