Hour Meter, Display Type LCD, Time Range 0 to 9999999.9, Bezel Face Size 2.86 in dia, Bezel Face Shape Round, Bezel Face Type Flange Mount, Elapsed Time To 999,999.9, Hz 50/60 Hz, Number of Digits 8, Display Units Hours/Tenths, Bezel To Back Length 0.75 in, Depth 1 in, Ambient Temp. Range -40 Degrees to 185 Degrees F, NEMA Rating 12, 4, 4X, Material of Construction -, Input Type 10 to 300 V DC or 20 to 300 V AC, Reset Type Non Resettable, Temp. Range -40 Degrees to 185 Degrees F