Product Features:
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The glasses are made of Polaroid mirror Lens which can block ultraviolet radiation and its high quality and special material make the glasses shock-proof and anti-static electicity and its TR 90 flame. _x000D_
Stereo sound and the player is compatible with MP3/WAV/WMA; voice output power: 5MW+5MW; voice output frequency: 20Hz-20Khz._x000D_
Support bluetooth communicating function._x000D_
Its battery: continuous playingt time: 4 hours;recharging time: 2 hours; built-in polymer battery: 3.7V,150mAh. _x000D_
2GB Memory._x000D_
Integrated USB Flash Drive with Standard USB 2.0/1.1 port. _x000D_
Color:Black.