Professional manufactory supplying MP3 Sunglass, MP3 Bluetooth sunglass, Bluetooth sunglass, MP3 LCD Sunglass,which enjoy a good market in Euorpe, North America. 1. 3D stereo 2. Up to 6 hours of playing time 3. Digital voice recorder 4. Integrated USB drive 5. Polarized and interchangeable shatter proof lenses 6. Compatible formats: MP3, WMA 7. Standard USB 2.0 port and high speed cable included 8. Battery consumption & save function