Sony MDR-EX210B/BLU Hear every note with the MDR-EX210B EX Series earbuds. Boasting a bold design and legendary Sony audio technologies, these earbuds feature 13.5mm driver units which produce rich and dynamic sound reproduction with solid bass performance. Plus, the hybrid silicone earbuds ensure a perfect fit while delivering supreme comfort. Customize your listening experience with three different sizes of included hybrid silicone ear cushions. A nylon carrying case with slide out tray is also included.