Name: MP3 sunglasses
Optional FM
.Lens of  Polaroid  from America company
.TR 90 Flame
.Shock proof and Anti-static electricity 
Audio
.Compatible formats:MP3/WAV/WMA
.Stereo sound
.Voice output power:5MW+5MW
.Voice output frequency: 20Hz-20Khz.
Battery
Continuous playing time:5 hours
.Recharging time: 3 hours
.Built-in lithium-ion polymer battery:3.7V, 150mAh
.Automatically detected battery voltage and capacity
.Auto power off
Memory storage
.Available flash memory size: 128MB/256MB/512MB/1G/2GB/4GB
.Standard USB 2.0 port
.Integrated USB drive
.Share same USB port for download, upload and charge1