Sennheiser PXC 450 Active Noise-Canceling Headphones Outstanding sound thanks to adaptive baffle damping and patented Duofol diaphragm Best possible protection from outside noise (up to 90%) with NoiseGard technology Talk through function allows you to talk undisturbed while wearing headphones Full accessories: soft case, 2 audio adapters (in-flight entertainment and 6.3mm/1/4&#34;), batteries. Audio always works, even in passive mode and without batteries. Please Note: Kindly refer the User Manual before use. Connectivity technology : Wired