Carefully engineered enclosure that is inspired by beehive structure with numerous hollow cells surrounding the main driver mount Allows easy access to hands-free talking call management and music control via remote in-line control Full featured titanium diaphragm developed to deliver a wide range and acute frequency response from 10Hz to 23000Hz, while maintaining an ultra-low harmonic distortion across the range for enriched and enhanced HD music listening experience In-and-behind-the-ear form-factor human engineering design that conforms to the ears ergonomically for a locked-in and secure-fit position for sports-active lifestyle or everyday versatile indoor/outdoor use The cell coupled with a rigid enclosure material result in a optimum resonance free chamber for the moving diaphragm to reproduce the most natural bass response with impactful hits