Description‎:‎This lightweight and discreet headset lets you easy to control your music‎.‎ The behind‎-the‎-head wearing style is both comfortable and stylish‎.‎ So take your music with you and leave the tangle of wires behind‎.‎ You can take it anywhere you want‎.‎Main Feature‎:‎Four colors for you to choose‎:‎ Black‎,‎ black+green‎,‎ black+red‎,‎ black+blue‎!‎This product is especially designed for active people‎.‎ Enjoy your sports and music at the same time‎!‎Support TF card‎.‎‎(‎TF card NOT included‎)‎ Just save your songs in your TF card and then get it played with this sport playerBe able to use directly as a portable USB disk‎.‎ Just save your files in it‎!‎Stereo soundOutput frequency‎:‎ 20HZ ‎- 20KHZPlay time‎:‎ Up to 6 hoursSystem required‎:‎ Windows 98/ 2000/ XP Feature‎:‎ Sports MP3 Player‎,‎ Stereo Sound Interface ‎:‎ Mini USB interface‎,‎ TF/Micro SD card slot Battery ‎:‎ Built‎-in rechargeable lithium battery Extension card ‎:‎ TF card ‎(‎not included‎)‎ Audio support ‎:‎ WMA‎,‎ WAV‎,‎ MP3 Package weight‎:‎ 0.128 kg Product size ‎(‎L x W x H‎)‎ ‎:‎ 15.0 x 13.0 x 5.0 cm Package size ‎(‎L x W x H‎)‎ ‎:‎ 19.0 x 19.0x 6.0 cm Package contents‎:‎ 1 x MP3 Player‎,‎ 1 x USB Cable