Hour Meter, Display Type Electromechanical, Time Range 0 to 999999.99, Bezel Face Size 1.89 in x 1.89 in, Bezel Face Shape Square, Bezel Face Type Panel Mount, Elapsed Time To 999,999.99, Operating Voltage 10 to 30V DC, Hz -, Number of Digits 8, Display Units Hours/Tenths, Bezel To Back Length 1.1 in, Length 1.89 in, Width 1.89 in, Ambient Temp. Range 5 Degrees to 122 Degrees F, NEMA Rating 4, Material of Construction Plastic, Input Type -, Reset Type Non Resettable