Electromechanical Counter, Number of Digits 4, Mounting Panel, Max. Counts per Second 10, Height 1.8 in, Depth 2.99 in, Width 1.8 in, Display 0.16 in White Numbers on Black Background, Input Signal 115V AC, Input Voltage 115V AC, Min. On/Off Pulse 50 / 50 msec, Reset Type Push Button, Special Features 3W Power, Fits Panel Out 1.46 in x 1.00 in