KOSS ISOLATION CUSTOMFIT EARBUD STEREOPHONE FIT EARBUD STEREOPHONE

Rotate the crafted knurled knob to expand ear cushion and provide a custom fit

Custom seal allows the variable matched transducer to directly couple with the eardrum

Transducer features a custom ported design to enhance frequency response and deliver deep bass

Specially cross-matched transducer for balance across the entire musical spectrum

Frequency response: 10Hz-20kHz

Double padded fabric cord with zipper clip helps minimize tangles and ensure secure placement

Includes soft leather case and rugged tin case