They don't charge. I contacted the company I bought them from and I'm still waiting for a replacement after 15 days. Unacceptable

I have them for 2 months.
They have satisfactory sound quality for their price, but don't expect anything mind-blowing.
Their battery easily lasts for 3 hours of bass-heavy music at around 50% volume, and the case provides 4-5 recharges.
They are lightweight and comfortable in the ear for several hours without causing fatigue; you almost forget you're wearing them. However, I would recommend experimenting with all the earplugs for proper use.
The screen is not LCD or OLED, but it has simple LEDs that blink in different positions to indicate information. It shows the battery level of the case, and when charging, it displays the battery level of each earbud with 5 lines.
It managed to charge my 5Ah battery phone, which was at 18%, before the case ran out of battery.
After about 2 hours, the left one has a minor glitch and plays the music with a very slight but noticeable delay in the sound, which can be fixed with a 2-second pause in the audio.
Other than that, it is the only flaw I have found, and it may be limited to my own experience.
I would definitely recommend them for their price.

Perfect headphones! They have amazing sound. The screen resolution is HD and very clear, even under the sun. They isolate external noises, even when you are in the subway and there is noise. Their power bank works perfectly for charging the phone. I use them daily, for at least 5 hours, and the battery has dropped minimally.