AIRFLOW - A patented sound technology using an air-filled hollow tube to increase air space and sound development which produces more body and delivers a "Live" listening experience. CLIC-IT - Magnetic end-caps on the earbuds provide a quick and convenient way to wear your headphone around the neck when not listening to music or talking on the phone. MIC/SWITCH - Built-in microphone with ON/OFF switch. SECURE FIT - S/M/L rings for a custom and comfort fit.