The Wii Nunchuck controller is a secondary controller that adds even more innovation to the next generation of gaming, and does it all with less physical movement.
Contoured perfectly to fit a player's hand, the Nunchuck controller builds on the simplicity of the Wii Remote controller. Also includes an analogue stick, and two buttons to help assist in character movement. Many games will allow you to control your character's movement with the Nunchuck in your left hand, while your right hand is free to execute the action movements with the Wii Remote.
For example, the Nunchuck is particularly useful for games like Wii Boxing. You can use the Nunchuck to punch with your weaker hand, while you use the Wii remote to punch and jab with your predominant hand.
In first-person shooters, the Nunchuck controller carries the burden of movement, freeing you to aim and fire using a more natural motion with the Wii Remote. In a football game, you can make your quarterback elusive with the Nunchuck controller while you search for an open receiver to throw to using the Wii Remote. Because the Wii Remote and Nunchuck controllers are only relatively dependent on each other, players are free to hold them in whichever hand is most comfortable.
Perfectly suitable for either right or left-hand use, the Wii Nunchuck controller grants accessibility not often seen in previous game controllers.
Also, the Nunchuck controller doesn't need its own power--it plugs into the Wii Remote controller when it's in use. So there's no need to worry about charging or replacing expensive batteries. Adding a Nunchuck to your Wii system will definitely help you open the doors to the next level of gaming, and seriously step up performance.
Just be careful not to knock out your significant other, or bruise the dog, severely, while using one, or two Nunchuck controllers.