... 1,Waterproof headphone; 2,IPX8 for 3 meters under water; 3,Over 6 hours playing time; 4,Easy and comfortable to wear. Waterproof MP3 ... PlayerRubber material Detachable internal memoryEasily plug in internal memory to Upload and download mp3 filesBuilt-in lithium ... Black, Blue, Orange, Green, Red any color needed Sports Neckband waterproof mp3 player with bluetooth