1.headphone MP3 player 2.headset style 3.C2 sport mp3 4.Great sounding headphone mp3 5.Built-in rechargable Li-ion battery 1.C2 Sport MP3 player2.headphone/headset shape3.MP3/WMA formats 4.Powered by built-in rechargeable Li-ion battery5.Playback time around 4-6 hours6.USB 2.07.Color: black, blue, green8.Accessories: USB cable, Users manual