industrial counter have two signal input "+" and "-" First:as counter,can add or minus button or remote control or sensor industrial counterhave two signal input “+” and “-“Specification:First:as counter,can add or minus.Second:1, Led high of character:8" red led digital display2, Power wire: length 1.5M.3, Remote control:infrared remote control or button4, two pulse signal input.Third:function ...