Audio-Technica ATH-CKS1000 Solid Bass In-Ear Headphone w Microphone (Black) Newly developed Double Air Chamber System expands bass output for powerful bass without sacrificing audio clarity Exclusively designed 13 mm drivers create an entirely new rich audio experience Rigid aluminum parts eliminate unwanted vibrations to deliver powerful sound 2 position post maximizes sound isolation while providing a better fit 2.6-ft. (0.8 m) extension cord with microphone and remote for answering and ending calls, controlling music and video playback & controlling volume on smartphones & other compatible devices