The Bose QC Ultra 2nd Gen Headphones in Black are high-quality over-ear headphones designed for studio monitoring, DJ, and live monitoring use. With a driver size of 40mm and a frequency range of 9.1mΩ, these headphones offer excellent sound quality. The built-in microphone, noise cancellation feature, and Bluetooth wireless technology make them convenient and versatile for on-the-go use. These headphones come with a full kit, including a headband form factor and a 3ft cable length, providing a comfortable and immersive listening experience. With a manufacturer warranty of 1 year, you can trust in the durability and performance of these headphones.