Audio-Technica ATH-CK6ASV In-Ear Headphones come equipped with three sizes of earpieces that provide a tailored fit and block outside noise. Audio-Technica ATH-CK6ASV In-Ear Headphones fit for any wearer. Audio-Technica ATH-CK6ASV In-Ear Headphones incorporate miniaturized, advanced-technology rare-earth drivers to deliver an immersive listening experience for jogging, exercising, traveling, listening in the office or relaxing at home.