It looks like Sony is going to follow-up its popular wireless headphones with a new model as the WH-1000XM4 leak online.

We scored the Sony WH-1000XM3 a rare five stars in our review so we're looking forward to seeing what Sony can do to make these amazing noise cancelling headphones even better. 

When will the Sony WH-1000XM4 be released?

It's unclear exactly when the 1000XM4 model will launch, but the fact they've been spotted is a good sign. 

Summer of 2020 seems likely if you ask us, provided the caronavirus doesn't push things back. If tech show IFA 2020 goes ahead in September, Sony could well announce the headphones there.

How much will the Sony WH-1000XM4 cost?

There are no price rumours just yet, but we expect the XM4 to cost at least the same as the XM3 or more. They came in at £329/US$350.

What will be new on the Sony WH-1000XM4?

There's not a huge amount to learn from the leaked photos. These are via Everton Favretto who spotted them in an Anatel listing – Brazil's version of the FCC. An FCC listing also points at the new model.

If these are the XM4, then it looks like the design will be extremely similar. In fact, they look identical based on these photos.

Looking at them might not give much away but a user manual in the listing suggests some upgrades that might make the XM4 better than its predecessor.

Blutooth 5.0 is an obvious upgrade as the latest standard and will bring improved wireless range and more reliable connectivity. 

Power consumption is listed at just 2W compared to 8W so the Sony WH-1000XM4 should have longer battery life. The manual indicates a jump from 36- to 40 hours.

Last but not least is a new feature which looks like it will let you activate a voice assistant (Google Assistant, Siri or Alexa) with a key phrase. At the moment, the XM3 does this with the press of a physical button.

Check out the best headphones we've tested.