Just like the Wii Remote, the Wii Nunchuk part is motion sensitive and senses how you move it in the air. Remember, you need a Wii Remote for each additional Wii Nunchuk you buy. Together with the Wii Remote, the Nunchuk creates a completely unique gaming experience that can only be found on the Nintendo Wii and Wii U consoles. Whether you fight with sword and shield like in Zelda, or use both hands in a boxing match, you now have the controls directly in your hands. Have fun!