The MP3&bluetooth sunglasses(MP3 y bluetooth gafas de sol) has bluetooth and MP3 function. Itis a good digital sunglases(gafas de sol digitales). The bluetooth tech helps u to communicate wirelessly, the MP3 will let's enjoy the music. Tech parameters of MP3&bluetooth sunglasses: Function of MP3 player *Support various audio-formats *Such as MP1, MP2, MP3, WMA, WMV, ASF and WAV *Firmware updating *Latest software can be downloaded from the internet to expand functions of this product. *Drive-free flash disk function *Users could operate documents through "Mobile Disk" I "My Computer" without any executive programs. No driver is needed for operating systems that are advanced than WIN2000. Features of Bluetooth Earphone: *Comply with Bluetooth protocol v1.1 single stack play mode *Transmission range: 6 to 10 meters *Continuous talking time: 3.5 hours *Low cost and power consumption *Small in size and convenient to be carried *High-sensitivity RF chip embedded for transmission *Low-battery monitoring *Can be paired with 8 cell phones simultaneously Accessories: USB wire, Charger, compact driver disk, instruction book, glasses case