Features:  * Mini microphone、 humanized design、 comfortable for wearing. * Excellent noise reduction、 isolated from outside interference、 enjoy your music moment. * Unique sound chamber design、 0.5mm gossamer-thin diaphragm. Specifications:          General Specification             Brand         BYZ             Model         K53             Color         Black、 Gold             Cable Length         1.2m             Wearing Type         In-ear           Technical Parameters             Connectivity         Wired             Conectivity Interface         3.5mm             Receive Sensitivity         110dB             Impedance         35!#!amp!*!Omega;             Frequency Response         20-20000Hz    Package  Included:                 1!#!amp!*!times; Earphone           1!#!amp!*!times; pair of earmuffs