1) Unique design: Wirelessly combines digital music MP3 player and polarized lens

2) Polarized lens: blocks 100% of all UVA, UVB, UVC and harmful blue light

3) Wear glasses with the lenses flipped open when it is dark

4) Supports MP3, WMA and WAV format

5) Memory capacity: 64MB-2GB

6) USB2.0, backward compatible with USB1.1

7) Signal-to-noise ratio: 87.2dB

8) Playback modes: random play

9) Earphones response bandwidth: 20 - 20,000Hz

10) Earphone adjustment: can adjust the earphone extenders to fit users' ears, turned up and down-270 degrees rotation

11) Built-in lithium-ion polymer battery: 3.7V, 150mAh, up to 4.5 hours continuous

12) Lightweight frame material offers all-day comfort

13) Capacity choice: 256MB / 512MB / 1GB /2GB/4GB

14) Weight: 55g

Bluetooth technology (optional):

1) Compatible with different Bluetooth compliant mobile phones

2) Crystal clear sound quality: range of 10 meters (between hands free and mobile phone)

3) Stylish and lightweight design. Users can talk on the mobile phone hands free