7 800 x 480 pixel Color Display allows you to watch videos, movies, view song information and pictures, and browse e-books * 4GB of memory stores up to 2,300 songs, 20 hours of video or thousands of e-books * Supports the most popular e-book formats including TXT, EPUB, FB2, HTML, PDB, PDF and DOC * Expandable microSD card slot holds up to 40,000 e-books (microSD card sold separately) * Built-in MP3 player allows you to complement your reading with your favorite background music; supports MP3, WMA, WAV, FLAC, and more