Digital product can play MP1, 2, 3, WMA, WMV formats. Support bluetooth communicating function. Lens with trendy appearance. Reinforced polaroid polarizing lens provides clear, natural sight, and excellent  anti-impact performances. Shields UV, glare and diffused light, allowing you to enjoy music in the sunlight without disturbance, and protect your eyes and eyesight. Flexible earphone cord in beat length. Hi-Fi stereo earphones bring you endledss joy of high quality music. Built-in lithium battery support 4 hours playback.