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