The Bose QuietComfort 35 Series II are wireless over-ear headphones. These headphones differ from the original QuietComfort 35 headphones with the addition of a button on the left earcup. Press and hold it to speak to Google Assistant when connected to your Assistant-enabled device. Or, use it to change the level of noise cancellation between Full, Low, or Off. The headphones can be paired with two devices at once via Bluetooth or NFC technology, and accept voice prompts in English, Spanish, Mandarin, Dutch, with other languages available through Bose's website. The included Bose Connect app allows you to switch between multiple Bluetooth-enabled devices easily, keeping your headphones digitally up to date at the same time.