With feedforward and feedback mics on each side, WH-XB910N takes digital noise cancelling to the next level. Now you can truly shut out the world around you and enjoy your own party for one with just your music for company. These noise cancelling headphones enhance all your low-end frequencies for exceptional bass. When an original music source is compressed, it loses the high-frequency elements that add detail and richness to a track. Our Digital Sound Enhancement Engine (DSEE) faithfully restores these to produce high-quality sound that’s closer to the original recording With up to 30 hours of battery life, you’ll have enough power for multi-day road trips and long festival weekends. And if you need to top up in a hurry, a 10-minute quick charge gives you up to 4.5 hours of extra play time with the optional AC adapter. Conversation flows freely with easy hands-free calling, now clearer than ever with a high-quality built-in microphone. You won’t even have to take your phone out of your pocket For total convenience, WH-XB910N headphones can be paired with two Bluetooth devices at the same time. So when a call comes in, your headphones know which device is ringing and connect to the right one automatically. Change track, adjust volume and take or make calls by tapping the touch panel on the side of your headphones. Need to quickly hear voices or sounds around you? Just place your hand over the housing to instantly turn your music volume down and let ambient sound in. These Sony headphones allow you to communicate without taking your headphones off. Place your hand over the right ear cup to turn the volume down and deactivate noise canceling for instant conversation. Tailor sound to your personal preference. Choose from a variety of presets to match sound quality with the genre of music you're listening to. Or create and save your own presets using the EQ Custom feature on the Sony Headphones Connect app.