Over-ear headphones have soft ear cushions and a headband that spreads pressure evenly for all-day comfortBluetooth 5.3 connectivity allows for wireless connection to Bluetooth-enabled devices within a 30-foot range, with single- or multi-point connections availableBose SimpleSync makes it easy to pair your headphones with select Bose smart soundbars, sold separatelyInnovative spatial audio technology ensures more natural, immersive listening experiencesCustomTune technology analyzes your ears to adapt to their unique shape, delivering custom-tailored soundImmersion Mode combines full noise cancellation with Bose Immersive Audio for world-class noise cancellationQuiet Mode lets you tune out distractions and focus on your music, while Aware Mode allows background noise to filter inEarcups offer simple built-in touch controls, allowing you to play or pause music, adjust the volume, and more without touching your phoneBose Music app lets you personalize your listening experience with Adjustable EQ settingsNoise-rejecting microphones pick up your voice clearly and effectively filter out background noise, with sound delivery available through one or both earcup speakersQC Ultra headphones offer up to 24 hours of listening time on one charge, or 18 hours in Immersion Mode with Immersive Audio onQuick 15-minute charge delivers an extra 2.5 hours of music, or two hours in Immersion Mode with Immersive Audio onDisclaimersQuick charge testing conducted by Bose by charging battery-depleted headphones for 15 minutes, then resuming audio playback at a loudness of 75dBSPL. Battery life varies based on settings and usage. Time to achieve fully charged headphones was determined by charging battery-depleted headphones to 100%