Bose® QuietComfort® 35 Wireless Headphones II are engineered with world-class noise cancellation. Even better they free you from wires, connecting easily to your iPhone and iPad with Bluetooth. Clear voice prompts walk you through the connection process and the multi-function button continues to offer access to Siri.Volume-optimized EQ gives you balanced audio performance at any volume, while a noise-rejecting dual-microphone system provides clearer calls, even in noisy environments. The headphones feature up to 20 hours of wireless listening per charge and are designed with premium materials that make them lightweight and comfortable for all-day wear.The Bose Connect app helps you set your preferred level of noise cancellation, unlock more features, and access future updates. And you get caught with a low battery, the included cable lets you plug in and keep the music playing.World-class noise cancellation makes quiet sound quieter and music sound betterLithium-ion battery lets you enjoy up to 20 hours of wireless listening per chargeNoise-rejecting dual-microphone system provides clearer calls even in noisy environmentsMulti-function button continues to offer access to Siri on your iPhoneBose Connect app helps you set your preferred level of noise cancellation, unlock more features, and access future updatesIncludes audio cable for music listening without battery power.Premium materials provide light weight and comfort for all-day listening