This is the v200 gaming headset from qcy, they connect wired only with type c and wirelessly with Bluetooth and 2.4ghz, with all these devices, they have a detachable microphone, leather ear pads which are also replaceable, quite flexible, very comfortable, crazy battery life, they have software to adjust the eq, put filters on your voice, enable effects and an extra positive, whatever setting you change, it is saved inside the headphones.
All frequencies perform just fine, obviously you don't expect crazy bass, flawless high frequencies etc., it's just enough, the 7.1 works perfectly and I can't complain because, man, they only cost €35 from Skroutz and they compete equally with headphones at double the price.
On the negative side, the microphone, ok it's not for much, and also when I plugged in the usb dongle via the adapter, I noticed a slight delay in the sound, but when I plugged it in normally with the type c, the response was instantaneous.
I don't know of course if it's affected because I have a bunch of peripherals with 2.4ghz
For €35, it's a yes from me

They are excellent. In online reviews, two problems are mentioned. The first has to do with the volume and the bass, and the second concerns the software that doesn't work on desktop.

None of these are true. The volume is booming both in Bluetooth and 2.4GHz. The bass is a bit weak, but... the software has been updated and now you can adjust the bass through the software. The 7.1 works perfectly, as long as you enable it from the software, and it has a bunch of other settings for dynamic bass, voice clarity, and various others. I don't know if the software didn't work in the past, but now it's amazing.

On default settings, where you just plug them in and don't bother, they're just fine for 35€ headphones... but honestly, by changing the settings in the software, it's like having different headphones. I have tried many headphones in the past, mainly USB or 3.5mm, cheap and expensive, but these really impressed me.

Also, if you make changes in the software, they are saved to the headphones, so you don't need to have the software open every time for the settings to apply. And there's also an option to create a settings profile. There are also some silly features for the microphone, like making you sound like a cartoon, or changing the voice from male to female (and vice versa), etc. It's called Magic Voice :)

No comments needed for the battery... the longest-lasting I've ever seen. And one more thing, the ear pads are detachable for easy replacement. They have that classic leatherette, which will probably wear out after a few years. The same leatherette was on some Sony headphones I used a long time ago. But they are easy to replace if they wear out, or you can just leave them worn...

...and one last thing, I made the settings changes from the desktop app while connected with the dongle. If I switch to Bluetooth mode, the settings are not saved. It's like there are two different profiles for Bluetooth and dongle. The mobile app, even though it was connected via Bluetooth, didn't apply the settings. The mobile app probably needs an update because it's been a while.

Measured db performance in highs and lows, same as other wireless headphones from other companies that cost 70-80€... and that's it.

They will never perform like professional 200€ headphones, but they only cost 35€, and perform like they cost 70-80€. If you want more, you have to go much more expensive.

After 4 days of use, I have to say that the headphones are incredibly good for their price, but with some issues. Note that everything I say is judging "Quality for price" and I am not comparing them to €200 wireless ones.

For music, they were excellent. The same experience I had with the corresponding QCY Headphones on my phone. Positive for a Gaming Branded headset at this price, and even more so for a wireless one.

But let’s get to the Games! Which is the main reason to get these headphones. Overall, my experience was very good with a small or big but. While the headphones have bass, the sound is not "full", as if some frequencies are missing, resulting in some sounds not being so pleasant. At first, I didn’t notice it in Games, so it’s not a problem, but the first annoyance came when I was watching a video on Youtube and someone whispered close to the microphone, so the sound became very bassy. Then I felt that "something wasn’t so pleasant," but not to the point of being unlistenable, it just didn’t sit well with my ear. Then I went back into Games with this in mind and tried to observe it, and indeed some sounds are heard a little differently in the lower frequencies. But as I said, without causing a problem, and at this price, it’s logical that they don’t cover 100% perfectly.

If they were €20 more expensive, I would give 4 stars instead of 5, but at €35 there is no complaint, it’s reasonable.

They connect via Bluetooth, 2.4GHz Wireless (both USB C and USB A), and with a cable. Their wireless performance surprised me. I have many wireless peripherals on my desk (2 mice, keyboard, my main headset, and a router EXACTLY behind) and usually cheap or bad wireless peripherals cause interference, lose signal, etc. These, however, were flawless.

Finally, from the QCY site, I downloaded the QCY Heroad Driver, which is the software for the headphones. I don’t know if something is wrong with my PC (likely scenario), but while the program gives you the ability to make your own EQ, for now, it doesn’t work. It doesn’t affect the sound. It’s the first time QCY makes a Desktop App, so I believe they’ll fix it soon, since in the QCY mobile app, they immediately fix any reported problem. Of course, I never use any software for my peripherals, I use them Plug n Play so I’m not that interested, I just mention it. And 95% of users just install them and never open them again.

Overall, I liked them and I recommend them for their budget. For wireless headphones at this budget, they have a very good overall result.