The click wheel for the iPod Mini was a revolutionary feature to the Apple ecosystem, and was an enormous step forward in advanced user experience and interaction methods. It uses a combination of touch technology and traditional buttons, involving the technology of capacitive sensing, which senses the capacitance of the user’s fingers. The click wheel detects a user’s input via its touch sensitive ring. Because of four mechanical buttons that lie beneath it, the ring is able to perform multiple commands. For example, browsing through music, after selecting a particular song, the click-wheel is used to adjust the volume. Pressing the select button can be used to skip to a specific part in the song. The wheel allows a user to find music, videos, photos and play games on the device.
