... -FiSupports FMSupport 3G (module is optional)Built-in double speakers Built-in NAND flash 128MBBuilt-in motion sensorSupports file format: TXT, HTML, PB2 ... , PDF, PDB, EPUB,CHMSupports edit, zoom in/out, dictionary and notepadSupports image format: JPG, BMP, PNG, GIFSupports ...