This must be one of the most stylish and unique stereo headphones available today that also delivers excellent sound quality and the bass booster provides an acoustically-tight seal for superior sound isolation, deep bass sound and tight bass response. Features include: Direct sound delivering earpad with soft cushion Swivels for flat and easy portability Hands-Free phone calls for Smartphones Sensitivity: 102dB/ mW Frequency response: 5Hz – 22,000Hz Cable: 1.2m 3.5mm adaptor Packaged in a custom Swiss Cougar box