This MP3 player is mini, lightweight and portable. So it is very suitable for you to carry when you do sports. If you want listen to the music when do sports, you can choose it.  Features: Fashionable appearance and fine workmanship. Mini size, portable and easily to carry in your pocket. No external power supply. Built-in rechargeable lithium battery, long standby time. Suitable for you to use when do sports with clip on the back. Specifications: Color: black, white, blue, pink, purple, green (optional) Material: plastic Play time: 2-3 hours Power: built-in Li-ion battery External memory: support up to 8GB Micor SD (TF) card (not included) Music format: MP3 USB port: 2.0 Power: built-in li-ion battery Item size: 4.3 * 2.9 * 1.2cm / 1.69 * 1.14 * 0.47in Package size: 4.4 * 3 * 1.2cm / 1.73 * 1.18 * 0.47in Package weight: 11g / 0.4oz Note: This item has no built-in memory, it needs an extra micro SD memory card to work. Package List: 1 * Digital Mp3 Music Player 1 * Micro USB Cable #digitalmusicplayer #mediaplayer #sportplayer #Headsets&Microphones #sportmp3player #musicplayersmp3 #pocketmp3player #Mp3 #colorfulmp3 #mirrormp3