Hour Meter Display Type Electromechanical Time Range 0 to 99999.9 Bezel Face Size 2.50 in dia Bezel Face Shape Round Bezel Face Type Flush Mount Elapsed Time To 9 999.9 Operating Voltage 10 to 80V DC Hz - Number of Digits 6 Display Units Hours/Tenths Bezel To Back Length 2.89 in Depth 2.89 in Ambient Temp Range -40 Degrees to 185 Degrees F Material of Construction Black Polymer Input Type - Reset Type Non Resettable Temp Range -40 Degrees to 185 Degrees F