4D earphone for iPhone BS-80i is an open sensory earphone that has a highly sensitive microphone and remote controller for iPhone. It provides phone-call feature and allows you to control various contents. You can even control your iPhone with your voice. Real 4D earphone (Feel the music instead of just listening to music) BS-80i transmits sound through the patented sensory unit (High range: mastoid / middle and low ranges: silicon chip). 70% of the sound is directly transmitted to the eardrum[...]