The Wii Balance Board (Japanese: バランスWiiボード, Hepburn: Baransu Wī Bōdo) is an accessory for the Wii and Wii U video game consoles. Unlike the usual balance board for exercise, it does not rock but instead tracks the user's center of balance. Along with Wii Fit, it was introduced on July 11, 2007 at the Electronic Entertainment Expo.