Sony Premium Lightweight Digital Noise Cancelling Extra Bass Stereo Headphones With Hands-free calling (Black) Active Noise Canceling - Designed to reduce up to 99% ambient noise when noise canceling circuit is activated Designed for Comfort - Lightweight 1.0 oz earbud-style design is easy to transport and sits comfortably in the ear, even during extended use Pristine audio - 13.5 mm drivers and neodymium magnets work to deliver more accurate sound reproduction and a wider frequency response for a pristine audio experience Ergonomic Design - The vertical in-ear style housing and three hybrid silicone ear pad sizes allow for a secure, personalized fit Accessories - Carrying pouch, in-flight plug adapter, neck-chain style cord with controller (59 1/8 inches), cord adjuster, and AAA battery included