... input "+" and "-" First:as counter,can add or minus button or remote control or sensor industrial counterhave two signal input “+” and “-“Specification ... display.2, Power wire: length 1.5M3, Remote control:infrared remote control or button4, two pulse signal input.Third:function requirement1 ... minus”_"2, Operation can be operated by push button,remote control can set value3, When power cut,it has keep ...