... fashion designs Card Wireless Headset/Electronic ear muffs/ear muff fashion designsFeatures:TF Card, HI-FI,Digital, Stereo,Wireless HeadsetCard reader function ... audio quality, Stereo soundLithium battery plaing time 8-10 hrs, Longlife abilityDownload study materials or music by USB cableThis headset support MP3 ... , USB cable.SD storage from 1GB-64GB Card Wireless Headset/Electronic ear muffs/ear muff