Just when you thought audio technology couldn't get any better, the Bose QuietComfort 45 Wireless Bluetooth Noise Cancelling Headphones step in to redefine your listening experience. As the successor to the QuietComfort 35 Series Ii, these headphones are the epitome of high-quality, stylish, and advanced audio equipment, offering an innovative and comfortable design that's perfect for both casual listeners and audiophiles alike.The QuietComfort 45 headphones deliver high-fidelity audio performance, thanks to Bose's proprietary TriPort acoustic headphone structure. This technology uses external ports to vent the earcups, effectively enlarging the acoustic volume without increasing the size of the earcup. The result Better audio and active noise reduction from a smaller, lighter, more comfortable headphone.These headphones also boast world-class noise cancellation, achieved through a combination of active and passive noise reduction technologies.