Taken from Engadget … Today, the company is making things official. As expected, the WH-1000XM4 is the follow-up to the stellar WH-1000XM3 that arrived in 2018 — and was due for an upgrade. With the M4, Sony is introducing some subtle tweaks to the design alongside several new features to make further improvements to the highly-rated 1000X noise-canceling headphones line.
For the most part, the M4 looks nearly identical to the M3. Sony opted for a soft-touch matte finish this time around, in addition to making changes to the headband cushion, headband curve and the size of the earpads. All of those tweaks make the M4 more comfortable than its predecessor, especially during longer listening sessions. Touch controls still reside on the right side, giving you the ability to play/pause, skip tracks and more with a swipe or tap. The Custom button on the edge of the left earcup offers access to active noise canceling (ANC) settings by default, but you can reassign it to summon Google Assistant or Alexa quickly.
Sony is promising 30 hours of battery life again on the M4. That’s the same estimate as the M3, and it’s plenty of time to get you through several work days. With Sony’s quick-charge feature, you’ll get five hours of listening time in 10 minutes. Like its predecessor, the M4 also supports 360 Reality Audio for more immersive sound. If you’re willing to pay for a pricier high-res streaming subscription, of course.