1. U-disk, can repeat downloading music, support MP1/MP3/WMA and other music format etc.
  2. Polarizing lenses, top-class sunglasses lens.
  3. Bluetooth function, support many kinds of mobile phone play music by   bluetooth . 
  4. Continuously work for over 6 hours.
  5. Earphones have flexibility and can be fixed within an angle of 270 degrees at random