It uses the latest E-ink display with added color filters (8 colors available) and comes with a rechargeable stylus pen equipped with a Wacom digitizer. Many people use the Quaderno to store sheet music. Connecting it to a foot pedal lets you turn the pages of the sheet music without taking your hands off the instrument you are playing. The Quaderno solves the problems of paper sheet music, such as being heavy and bulky and making it difficult to turn the pages while playing. The Fujitsu Quaderno A4 Color features a flexible 13.3-inch Kaleido 3 e-paper display with a black and white resolution of 1650 x 2200 and 207 PPI.