BUILD-IN SPEAKER: the mp3 player Equipped with Zinc alloy bottom shell?? makes it a solid and fashionable piece ??build-in loudspeaker?? enjoy music without"dphones .</br>LOSSLESS AUDIO: Excellent sound quality?? supports MP3?? WMA?? WAV?? FLAC?? APE and AAC.And you can add bookmark for your music files (including audio book it supports).</br>INNER STORAGE 8GB??Can be as a 8gb USB Flash drive?? and driving program is not necessary??Can store about 2000 songs?? TF/Micro SD Max extended to 128GB.</br>EASY TO USE: Use playlists to select your favorite songs. Supports shuffle and breakpoint play. Has sleep shutdown.Easy 'Drag & Drop' Audio Music File Management. Delivers professional recording results?? Built-in 360-degree way Record Marks?? PCM linear recording?? restore the most authentic recordings.</br>LONG BATTERY: Can last up to 40 hours after full charge ?? 4 hours by loud speaker under fully charged. so you can enjoy music a long time without worrying about the mp3 running out of power. the battery will charge completely in about 2 hours.You can charge it in with the general charger which output is "r></br>Product Description</br></br>Made for music! This is the newest version of the HONGYU MP3 player. M22 MP3 player has designed a NEW user-friendly interface that is highly different from others MP3 players!Easy to operate