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Everything in the WF-1000XM4 headphones has been redesigned. The new Integrated Processor V1 delivers unmatched performance while using even less power. Adding in drastically enhanced call quality, IPX4 water resistance, and up to 24 hours of battery life with wireless charging. Thanks to specially designed 6mm drivers, they reproduce a dynamic sound despite their small size, and the high compliance diaphragm reproduce a rich bass range. The Integrated Processor V1 also enhances sound quality and reduces distortion and enables LDAC code processing and DSEE Extreme. You can enjoy a full working day of charge of 8 hours from your headphones and store another 16 hours in the case. That means a full 24 hours of listening time every time you leave the house. In a hurry? Just a 5-minute quick charge gives you up to 60 minutes of play time.