Features: 1) Supports several audio formats, e.g. WMV, ASF, MP3, WMA, and other music formats 2) Polarold polariscope from US. 3) Compact and fashionable appearance, unique design, personality showing, it is not only high-grade sunglasses, but also top-grade MP3 4) Use high-grade sunglasses as its main frame, suitable for outdoor wearing when touring. Tenacious and strong glass frames, anti-shock and anti-break, no worry needed about strenuous exercise 5) Flexible, wireless headphone can be fixed within an angle of 270 degrees 6) One unique miniature port for both USB and charging, minimizing its volume greatly 7) Product dimensions: 165 x 163 x 55mm 8) Playing time: 6 hours, charging time: 3 hours