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Although it is just a button, DFRobot has considered more for you. Multiple details makeyou feel the exquisite quality of the button.Compatible with 5/3.3V voltages, suitable for the new generation main control board DUE of Arduino.With the capital letter "D" on it, it indicates that it is a digital sensor. At the other end, there is also a key identifierThe gold-plating process, combined with high-quality plugs. The quality has been further enhanced.