In the era when the mainstream LCD screens still adopt the solid flat structure, the design of numerous digital products is undoubtedly limited by the embarrassment brought by the screen size. Although the rollable OLED technology has been realized, when it can be mass-produced remains to be people's expectation. The gorgeous MP3 player designed by Chris Williams can't escape from this fact either. He used a clever way to increase the size of its visible screen while maintaining the physical volume of the player. Users can rotate the knobs at both ends to slide the display content on the screen and perform various operations (the operation method is somewhat similar to some products of Sony and Samsung).