Aerb&reg; 4G Waterproof MP3 Music Player for Swimming & other Sports (IPX-8 Standard) (Pink) IMPORTANT NOTE: Please refer the 'Product Description' section for troubleshooting. Contact the seller / Amazon seller support for any issues and clarification 100% water-resistant to a depth of 3 meters, designed for swimming and other sports activities; built with international IPX-8 standard; Unique clip attaching to swimming and skiing goggles, collar and waist belt friendly; Built-in rechargeable li-polymer battery (3.7V, 200mAh). Excellent design with perfect finish and crystal clear sound; be noted this player doesn&#39;t support shuffle and iTunes sync (you have to convert iTunes to mp3 or wma format songs); Support mp3/wma format songs using USB 2.0 data transfer;