1. HD stereo noise reduction Use deep stereo noise reduction technology to improve music and call quality and reduce external noise 2. Upgrade plug Add a plastic disc to avoid the wire-controlled reaction when the device jack is in contact 3. More professinal sound system The professional sounding unit is reorganized , and the high , medium and low frequency are precisely connected , and the sound quality is better 4. Double insurance is not easy to fall off The double-insurance design of the ear flaps , with it , runs freely without worrying about falling off
