Electromechanical Counter, Number of Digits 8, Mounting Base, Max. Counts per Second 25, Height 2.34 in, Depth 1.6 in, Width 1.5 in, Display 0.125 in White Numbers on Black Backgoround, Input Signal 24V DC, Input Voltage 24V DC, Min. On/Off Pulse 50 msec, Reset Type Non Resettable, Standards UL