Sony Secure Fit Dynamic Earbud Style Headphones - Black - EX Series Earphones with Powerful 13.5 mm Neodymium Driver Magnets, 4 foot Cord with a Gold Stereo Mini Plug & 3 Sizes Comfort Fit Hybrid Silicone Earbuds - Unbelievable Clarity and Rich Deep Bass Sound High Energy Neodymium Efficient Drivers reproduce clear mid-range and low-end sound. 13.5mm driver units provide rich and dynamic audio reproduction with solid bass performance. Secure fit with 3 sizes of supplied hybrid silicone earbuds that equate to a fine-tuned fit and enhanced music enjoyment. Vertical, in-the-ear design is optimized to sit comfortably and securely in your ear, the benefits are better sound isolation and long-term fit. Works like an earplug to block out noise naturally and enables you to listen comfortably at lower volumes even in loud environments. Extremely great value for your money compares in sound to most high-end expensive ear-bud headphones, at a fraction of the cost. Delivers super bass sound, just like in a studio with an unbelievable clear sound from just an earbud. Get the same sound as the high end expensive headphones for an amazing low price.