Product Description MP3 Sunglasses and Sunglasses with MP3 Player, color optional - Available flash memory size: 128MB / 256MB / 512MB / 1G / 2G - This MP3 Sunglasses is Standard USB 2. 0 port - same USB port for download, upload and charge - Built-in 3. 7V, 180mAh lithium polymer battery can play more than 6 hours - Automatically detected battery voltage and capacity - This MP3 Sunglasses's Earphone rotate : 270' - Compatible formats: MP3 / WAV / WMA - Super HIFI stereo earphone - Voice output power: 5MW + 5MW - Voice output frequency: 20Hz - 20kHz - Lens of polaroid from America - Shock proof and anti-static electricity - Fashion design, Dressing Cooling Accessories of Sunglasses MP3: USB cable, adapter, disc, user manual Colors optional Black, Red, silver, green, blue