Sony Premium Powerful Lightweight Extra Bass Stereo Headphones With In-line Microphone and Remote for Apple Iphone/Android Smartphone (Blue) 30mm Neodymium Dynamic Dome Drivers - Specially designed, powerful drivers deliver deep and powerful bass that perfectly complements today's popular music genres In-Line Remote with Microphone - The in-line remote with microphone allows for simple control: call answer/end, and audio track play/pause functionality Sealed Acoustic Design for Isolation - A tightly sealed acoustic design allows for a high level of sound isolation which aides in the reproduction of powerful and extended bass sound Swivel-Fold Earcups - Slim in stature with swivel-fold earpads, Sony Extra Bass headphones are lightweight when worn, yet easily stow away in a backpack or book bag when on the go Pressure-Relieving Urethane Foam Fit - Seamless, noise isolating ear pads use pressure relieving urethane foam for not only an outstanding fit, but also reduced ambient noise