Bluetooth Sunglasses music + support answer callThe sunglasses are using excellent lenses， with trendy appearance; it supports MP3，WMV， WMA，SAF，WAV music formats;reinforced Polaroid polarizing lens provides clear， natural sight， and excellent anti-impact performances. It shields UV，glare and diffused light， allowing you to enjoy music in the sun without disturbance， protect your eyes and eyesight;flexible earphone cord in best length， HIFI stereo earphones， up to 85 decibel volume， bring you endless joy of high-quality music built-in lithium battery support maximum continues 5-hour playback.