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This is the DFRduino Uno V3.0 from DFRobot. It is fully compatible with Arduino UNO R3. This board features the ATmega16U2 programmed as a USB-to-serial converter. An added bonus is that our DFRduino is still using the DIP package AVR Chip, which means you can remove it to update/reprogram the chip’s firmware, or even to place it on a finished, more compact project.