N85 Digital Wireless Headband headset Headphone FM SD Stero Music Player, LCD Display, Mp3 Player, SD Card Slot With Microphone color black and gray Active chip read card/play system No software required, plug and play High-quality speakers and sound chamber design It is not just a wireless headset but also a mp3, you can use it when you running, cycling, playing other sports, get rid of the lines plagued Rechargeable / replace the battery, convenient and practical, the battery can be used for 10 hours continuously of listening