Wii MotionPlus

The Wii MotionPlus (Wiiモーションプラス) is an expansion device for the Wii Remote video game controller for the Wii that allows it to more accurately capture complex motion. According to Nintendo, the sensor in the device supplements the accelerometer and Sensor Bar capabilities of the Wii Remote to enable actions to be rendered identically on the screen in real time.

During Nintendo's presentation of Wii's successor console, the Wii U, it was announced that it will have support for the Wii Remote Plus and its peripherals in games where use of its touchscreen-built-in primary controller is not imperative.