QuietComfort 35 wireless headphones II offer the same unmatched combination of acclaimed noise reduction technology, wireless freedom, audio performance, dual-microphone system and 20 hours of battery life as QuietComfort 35 headphones. However, QuietComfort 35 wireless headphones II also have a new Action button on the left earcup. In countries and languages where voice assistants like Amazon Alexa or the Google Assistant are available, the Action button gives you instant access to voice-controlled tasks. In countries where virtual assistants are not available, it lets you quickly toggle through two different ANR settings for optimal performance wherever you go.