8GB Memory Capacity: Built-in 8GB memory capacity ensures you to store your favorite songs freely. It supports MP3, WMA, WAV, FLAC, APE, OGG music formats. IPX8 Waterproof: Both headphones and waterproof MP3 player can stay submerged under water without damage, perfect for Swimming, Diving and more. Long Battery Life: 180mAh rechargeable battery offers about 10 hours of music playing time. You can charge it with USB cable via earphone jack. Back Clip Design: Attractive appearance with small body. Back clip design, you can easily carry it when traveling or doing sports. Born for Sports: Greatly enjoy music while doing sports without worrying about sweat or water, suitable for running, swimming, diving, etc.