[HI-FI APTX STEREO SOUND] Featuring latest Bluetooth 4.1 CSR technology and APTX audio decoding technology, they produce incredible sound quality with amazing deep bass and crystal clear treble, no matter your taste in music. Works great with rock, jazz, hip hop, country music, blues and more. Just feel the booming bass. [COMFORTABLE&SECURE FIT ] Thanks to adjustable earhooks which give you the best fit and extremely security, ELEGIANT H10 are secure behind your ears and rest comfortably in the ear canal. great for the Gym, Running, Jogging, Hiking, Cycling, and even impact Sports. Neckband design, no wires tangling, and it's easy to storage to your sports armband or arm package bag. [HAND-FREE CALL&CVC6.0 TECHNOLOGY] Adoptes CVC 6.0 NOISE CANCELLATION technology which efficiently reduces disruptive background noise like chatter and wind and offers crystal clear voice what ever you are! voice notification of incoming calls