Vktech 2G-W273 Portable Wireless In Ear Sports Headset MP3 Music Player (Black) Support Audio Format: MP3, WMA, WMV, WAV Memory Capacity: 2GB Data Transfer Connection Type: USB 2.0 Style: Hands free In-Ear, Closed, dynamic, CCAW Drive units Designed fashionable and cleverish appearance, fine workmanship