They took them from me as a gift for mainly music use. Unfortunately, in the sixth month, the left one stopped playing... It's a shame because I was satisfied with the sound quality, connection speed, and battery life. Only during calls, they couldn't hear me satisfactorily

The worst thing is that they charge whenever they want, especially the left earphone. For 15€, it's fine

I have never been a user of other Bluetooth hands-free devices like Apple Earbuds Pro, etc. I went to a store in my neighborhood with the intention of buying wired headphones for my iPhone, which happened to cost 30 euros, and they suggested that I buy these wireless ones for an additional 30 euros. They convinced me to buy them. From using them, their strongest point is the bass. You feel like you're in the cinema when watching a movie on Netflix. I don't know how noise cancellation works on other devices, but with these, it definitely ensures that I don't hear faint sounds from cars passing by under my house. With noise cancellation, I simply get the feeling that my head is in a bubble. If someone speaks close to me, obviously I will hear them. The sound range when using them with my iPhone 12 Pro is incredibly satisfying, unlike with an old laptop where it is disappointing (the device you connect to also plays a role). It's significant that their price is three times lower than Apple's Pro. My advice is to buy them before they become well-known and their price increases. They do a great job, and their design is quite good.

Update 03/06/2022:
After using them for 14 days, I can summarize the following:
1) When there is wind and you are outside on the street or in the car with the windows open, the person you're talking to can't hear you.
2) In order for the person you're talking to to hear you, you have to speak loudly as if they were next to you in a café where there are people talking (without music).
3) The sound and especially the bass are amazing.
4) I use them at the gym and they are comfortable. However, when someone calls me, I'm afraid they will hear me, so I'm careful about what I say

After 2 weeks of use, the left earphone stopped working.
I thought I was the only one having this issue, but many others have the same problem.
Great headphones with very good sound, but only one earphone is functioning. What should I do?

Extremely good headphones for the money. Aukey is an excellent company, especially in chargers.

Positive aspects:
- Noise cancellation
- Build quality
- Battery and application
- Audio and microphone during calls
- Range limit of 20 meters
- No disconnections and they connect to the device within a second once taken out of the case

Negative aspect:
- They cannot connect to more than one device simultaneously

Very good headphones.
My only objection is in terms of comfort. The size for my ear is a bit bigger.
Otherwise, perfect sound for music (tested on iPhone XR, 11, 12 Pro, Xiaomi Mi Mix, Xiaomi Mi10T).
It maintains a connection with the device comfortably at distances of 7-10 meters depending on obstacles.
They connect very easily and quickly.
They last a long time. During a 4-hour bike ride, they played continuously at maximum volume.
The case provides 4 charges.
The controls are at a good level (maybe a physical button would be better, like the old AirPods).
Speaking of AirPods, compared to AirPods 2, they are better in terms of music and slightly worse in terms of calls. I would still prefer them even if they had the same price.
Compared to AirPods Pro, they are the same in terms of music but they lag behind in calls and noise cancellation (especially if you are on a motorcycle or bike with wind, it is noticeable). Of course, we are talking about almost 1/4 of the price.