I got them yesterday. They connect easily and have relatively good sound, especially if you play with Dolby Atmos settings for their price. They fit relatively well in the ears.
I was a bit disappointed with the lack of type C and the absence of wireless charging, but it's okay.

The major problem that I personally encountered is the very poor range of them. You have to be very close to the Bluetooth source, whether it's a smartphone or a Bluetooth adapter from a computer.
And the second problem is the terrible battery! Defective product? Who knows?
I returned them and gave up. The first experience with QCY was extremely disappointing.

While their sound is good for the 14€ I bought them for, the battery and charging were okay, but after 4 months, one of the two earbuds stopped working. I also had issues with their connection many times, as only one of the two earbuds would connect (while both were functioning).

I decided to go back to QCY and this time I went for the QCY T10, which work perfectly half a year later without any issues, with a much better battery, sound, and overall better experience.

I have had them for 2 months now and I am very satisfied, calls in closed spaces are fantastic and the person you are talking to can hear you well. The battery life for music and games lasts for 4 consecutive hours because when you are not listening to anything, you put them back in the case to charge. I didn't find the fit at first, but once you figure out how it should sit well in the ear, everything is perfect. They are worth their money.

Perfect sound.
On the phone, I can hear them and they can hear me very well.
Perfect sound in music.. it really isolates external noises...
Today I received them... everything is perfect... it only loses connection sometimes... it can't find the headphones...
I hope this doesn't happen constantly.

2 pairs of headphones were purchased and they are great value for money in every sense of the term. They are durable and fit perfectly, the connectivity is instant and the communication is clear without interruptions. If you use one headphone, you can be sure that you won't have a charging problem for a week (meaning that the second one is in its case). The charging is fast and the range is quite good.

Fast connection with the mobile, good sound. Good quality and battery. In conversation on the machine, they can hear me normally. Logically, in more noise it will not be so feasible. Like most, of course, they lack in this aspect. Completely satisfied