Seamless Firmware & App Updates: Enjoy a smoother, more reliable experience with the latest firmware and Smart Control Plus app features for your Bluetooth headphones over the ear, including ANC toggle and touchpad off switch for premium music quality Audiophile-Inspired Sound: Sennheiser wireless headphones over ear with Signature Sound, 42mm transducers and aptX Adaptive deliver crystal-clear audio and deep, immersive music. Ideal for music lovers and travelers Personalized Listening Experience: Tailor your sound on the over ear headphones wireless via the Smart Control Plus app with integrated equalizer, presets, and sound modes for a unique custom audio profile, whether used for music, podcasts, or gaming Adaptive Noise Cancellation & Transparency Mode: Block distractions or stay aware of your surroundings with these headphones wireless Bluetooth for uninterrupted music enjoyment anywhere, ideal for commuters, students, and professionals Exceptional Comfort & Long Battery Life: These Sennheiser headphones wireless noise cancelling version are lightweight, foldable - designed with a cushioned headband and ear pads; enjoy up to 60 hours of long-lasting comfort playback with fast charging Crystal-Clear Calls: These noise canceling headphones have four digital beamforming microphones that ensure crystal clear voice pick-up, wind noise suppression, and easy voice assistant access