EXTRA BASS for impressively deep, punchy sound. The WH-XB910N wireless headphones with Bluetooth enhance all your low-end frequencies for exceptional bass. A dedicated bass duct on the headphone housing and increased air tightness between the driver units and eardrums help to create precise, punchy rhythms that lift every track. Active noise cancelling headphones for musical bliss. With Dual Noise Sensor technology, these over ear headphones take 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. Listen all day, charge in minutes. 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 your Sony wireless headphones in a hurry, the 10-minute quick charging feature gives you up to 4.5 hours of extra play time.