Sunglasses Sun Glasses Full Bone Conduction Bluetooth Headset Headphone For CellPhone Mobile Phone Sunglasses: Anti-UV400, Fits safety standards for lens, Lens of glasses for myopia: 450C Bluetooth: V4.0; standby:about 50 hours; Talking: about 4 hours; Music: about 2 hours Support connection to mobile phone, and computer for music, MSN,Skype; Support A2dp for superior, high-quality music listening Communication range : 10 meters(approx. 33 ft)(Barrier-free); Charge time: about 2.5 hours. Nasal bone conduction microphone: Specially auto-adjustable nose pad, design for high-quality communication; Special background noise rejection, for clear conversation anywhere.