Feature: Screen is controlled by keyboard "Target Output" is set or revised by the production chief through keyboard. "Current Output" is the quantity actually achieved, which is got by totalizing the input counting signals automatically. "Remaining Quantity" = "Target Output" - "Current Output", which is calculated automatically by the screen. Operation Environment: Temperature:-10oC - 50oC; Relative humidity: 0 - 95%. Power Supply: AC180 - 250V. Customized requirements.