This is a dual display digital counter that can be used as a industrial counter to count the quantity of objects in a single batch and the production line, and also can be used as length counter. It is widely applied in machine, light industry, electronic, food, package, leather, cloth weaving industry for counting, length, batch counting. Features: Dual 6 digits light-emitting diode display for clear reading. NPN and PNP sensor input is switchable. Includes 4 kinds of input mode, 6 kinds of output mode for option. Input and output is optional isolated. Counting Range: -199999~999999; Preset Range: 0.00001-999999. Can set alarm value for relay output. Can be connected with encoder, proximity switch, photoelectric switch, optical sensor, laser sensor, etc. Widely applied in chemical, machine, light industry, etc. Specifications: Material: ABS Voltage: 90~265V AC/DC Auxiliary Power: 24V DC Input: Pulse Signal: Square Wave and Sine Wave: 5V less than H less than 30V 0 less than L less than 2V up edge active Input Impedance: more than 10K Ohm Counting Speed: 30/5000CPS Counting Range: -199999~999999 Preset Range: 0.00001-999999 Response speed: switch type input 0~5000hz, incremental encoder input 0~2000hz Accuracy: +/-0.1%F.S Output: 2 Relay Contact Output Environment Temperature: 0~50 celsius Storage Temperature: -10~60 celsius Environment Humidity: 35~85%RH Insulation Resistance: more than 10M Ohm Power Consumption: less than 5W Contact Edge: Up edge active Item Size: 9.5 * 8.5 * 4.7cm / 3.74 * 3.35 * 1.85in Item Weight: 167g / 5.89oz Package Weight: 203g / 7.16oz Package Size: 11 * 10.1 * 5.5cm / 4.33 * 3.98 * 2.17in Packing List: 1 * Counter 2 * Brackets 1 * User Manual (English)