The WH-1000XM4 headphones use an array of intelligent technologies to create a seamless, hands-free listening experience. For example, simply start speaking to automatically pause your music in Speak-to-Chat, or enjoy adaptive playback thanks to a proximity sensor and two acceleration sensors that detect whether your headphones are being worn or not.WH-1000XM4 headphones blend sophisticated styling with exceptional comfort. Super-soft, pressure-relieving earpads in foamed urethane evenly distribute pressure and increase ear/pad contact for a stable fit. And with a lighter-weight design, you’ll barely notice you’re wearing them. With a massive 30 hours of battery life, you’ll have enough power even for long trips. And if you need to top up in a hurry, you can get 5 hours worth of charge after just 10 minutes with the optional AC adaptor.  Please help me with hands-free. Just say “OK Google” or “Alexa” to activate your preferred voice assistant. Enjoy entertainment, connect with friends, get information, listen to music and notifications, set reminders, and more. You can even control your headphones’ features like noise cancellation with your voice. For total convenience, WH-1000XM4 headphones can be paired with two Bluetooth devices simultaneously. So when a call comes in, your headphones automatically know which device is ringing and connect to the right one. You’ll also be able to quickly and smoothly switch your headphones to either of the two devices at the touch of a button.