We are talking about a product that was purchased at the price of 130 euros. It meets all my requirements in terms of sound, with perfect connectivity and modifications through Razer Synapse. The headset is over-ear, which makes it difficult for me as someone who wants to hear myself when I speak, but there is a feature to hear myself without delay through the app. It is worth it for everyday use headphones that will last you.

Very good headphones, long battery life, nice RGB even though you can't adjust it from the mobile app, only from a computer. They are quite comfortable even though they are not the lightest headphones. I highly recommend them.

They are very good, but Razer once again decided to use only a plastic frame, which makes them wear out more easily... Everything else is good, the sound is excellent (depending on their use), the battery is quite good and they can stay connected up to (relatively) quite far away...
The microphone, however, I wouldn't say has very good quality. The plastic they put around the metal of the microphone (that is, the part with its cable, not the microphone itself) often gets stuck when you try to close it.

Not a bad head set, it is vastly better then the Razer Blackshark v2 Pro 2019, but compared to Blackshard v2 Pro 2023, I would say the Kraken v4 is slightly worse.
Kraken v4 vs Blackshark v2 Pro 2023:
-Blackshark has much better mic
-Blackshark has louder speakers
-Blackshard has better battery life
-Kraken is a little cheaper
-Kraken looks "better"
-Kraken has RGB
All in all the Kraken is a huge improvement compared to the 2019 Blackshark but I do not believe it is really worth that much money, there are other manufacturers that provide similar specs for less money.

Excellent headphones, very good quality, Razer takes it to another level. They are expensive, but you get what you pay for, guys, they are worth it

Everything is very good, both the sound and the microphone; the only problem I have so far is with the Razer Synapse program, which does not recognize them when I connect via Bluetooth and does not adjust with the USB settings. In short, it loses a lot over Bluetooth.

I can't say that I went crazy about the sound, it's nice but it bothers me a bit in the ears after a while. The connection is very good and their battery is the best. If it were a little lower in price I could say that they are perfect but at this moment they are a bit overpriced...

Very plastic for its price but paradoxically has a quality feel. The headphones rotate so they fit many different heads, with a little adjustment they have been more comfortable for me than anything else has been. I joined a conference and everyone told me they could hear me crystal clear. Sound is amazing. The microphone retracts. My previous one was detachable and I lost it! In terms of appearance, it is simply stunning. I haven't checked if the RGB can be turned off in some way though.