The nunchuk-like device for Sony’s PlayStation Move has been given the simple moniker “navigation controller” and will enable players to navigate in-game characters in select PlayStation Move titles. The wireless controller adds directional buttons, an analog stick, and two shoulder buttons to the PlayStation Move control scheme. It will be used in most of the Move games that require navigating an in-game character, and replicates the control features of the left side of the Dualshock 3 wireless controller.

Source: PlayStation