The Wii is a seventh-generation home console designed to play proprietary optical discs resembling DVDs and miniDVDs. It helped popularize the use of motion sensing technology in videogames through the Wii Remote, a gamepad featuring acceleration sensing and infrared positioning using the proprietary Sensor Bar. The Wii Remote also features three face buttons, a D-pad, a trigger, three dedicated buttons for menus, a power button, and a speaker. It attaches to several accessories, most notably a Nunchuk that features an analog stick and two triggers. The Wii is backwards compatible with most GameCube games and peripherals.