SONY MDRNC60 Noise Cancelling Headphones Features: * Lightweight and Auranomic design for greater Wearing Comfort * Long Battery Life: Approx. 30hrs of Continuous Usage with a "AAA" Alkaline Battery * Neodymium Magnet for Powerful Sound * Ear-Conscious Design for Wearing Comfort * Improved Noise Canceling Method Reduces Noise by Almost 80% * Built-In Monitor Switch to Hear Surrounding Sound without Taking off Headphones
