1.Absolute music freedom with no wires or cords to dangle or tangle 2.Store up to 120 songs on the 512 MB version
3.Up to 6 hours of playback time on a single charge
4.75MHz DSP with 18-bit Sigma Delta DAC for state-of-the-art audio fidelity
5.Custom Mylar speakers with three directions of movement for precise positioning
6.Flip-up lenses with contours that maximize protection against sun, wind and side impact
7.Patented XYZ Optics® for razor sharp clarity at all angles of vision, even at lens periphery
8.Plutonite® lens material to filter out 100% of all UVA, UVB, UVC and harmful blue light
9.Durable O Matter® frame with less than 1.8-ounce total weight for all-day comfort
10.Supports storage of data files along with song files
11.Includes High Speed USB cable for transferring song files from Mac or Windows PC