Aerb MD191 4GB Waterproof MP3 Player W Waterproof Earphones (Black) Be noted, this player doesn't support shuffle and iTunes sync (you have to convert iTunes to MP3 or WMA format songs); Built-in 4GB memory, excellent design with perfect finish, plus crystal clear sound; support MP3/WMA format songs using USB 2.0 data transfer; 100% water-resistant to a depth of 3 meters, designed for swimming, running 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).