Stereo Bluetooth Headset with Adjustable Earphone ?New generation of wireless Bluetooth technology, exceedingly clear conversation and stereo sound, comfortable switch and smooth control ?36gram compact design with fashionable style ?High quality Bluetooth stereo sound, built-in surround stereo sound and enhanced woof effect with hand-free performance ?Adjustable earphone compatible with any head shape ?Human engineering design, comfortably fit for people doing sports, made from soft gum without any uncomfortableness by wearing it ?Built-in high capacity battery, long time conversation and standby, easy switch between phone call and music