UNO R3 is not inclued. This is a no-nonsense protective case designed specifically for the Arduino Uno. Unique design for Arduino R3 R4 with pin leakage, which provides easy connection to other components. Arduno UNO has no shell, it is easy to touch the conductor and cause short circuit and scratches. This shell protects Arduno UNO has no shell, it is easy to touch the conductor and cause short circuit and scratches. This shell protects the board inside and avoids shorting of exposed pins and solder joints.