Audio-Technica ATH-CKS550iSBL Solid Bass In-Ear Headphones with In-Line Microphone & Control, Blue 9.8 mm Dual Magnetic-Field Drivers with Multiple-Transition Diaphragms deliver superb bass Bass Venting System provides excellent air damping In-line control with mic for answering/ending calls and controlling music & video playback on smartphones and other portable devices Two-position post maximizes sound isolation while providing a better fit Includes silicone ear tips (XS/S/M/L) and carrying pouch