wii nunchuk
The Nunchuk (model number RVL-004) is the first attachment Nintendo revealed for the Wii Remote at the 2005 Tokyo Game Show. It connects to the Wii Remote via a cord that is about 1 to 1.2 m (3.5 to 4 feet) long. Its appearance when attached resembles the nunchaku, hence the name. It also resembles the middle handle of the Nintendo 64 controller. It features an analog stick similar to the one found on the GameCube controller and two trigger buttons (a last-minute modification changed the two triggers to one trigger and a C button, as described below). It works in tandem with the main controller in many games. Like the Wii Remote, the Nunchuk also provides a three-axis accelerometer for motion-sensing and tilting, but without a speaker, a rumble function, or a pointer function. The Nunchuk's accelerometer is an STMicroelectronics LIS3L02AL.
See also:
This tag implicates nintendo_controller, wii (learn more).