Xiaomi Redmi Buds 4 TWS Auricolari white BHR5846GL

External
It comes in blue and white (but not always) and you can tell they have a typical earphone shape.
It comes with a box that stores and charges the earphones, and as it's a power bank, even when there's no electricity.
Waterproof with IP54 level and in-ear, i.e. also has earplugs (in different sizes)
sound characteristics
Its sound is detailed by a 10mm speaker and tuned by Xiaomi, so it sounds good.
It also has Bluetooth 5.2.
Use
These earphones can be used in pairs or just one, which can be either left or right. It also has a microphone, so it can be used for calls as well, and of course there are 1-1 touch buttons on both earbuds, which have the usual functions: switch between numbers, receive calls, etc.
It is more convenient to use touch buttons, since we don't have to put pressure on it.
Low tone delay
The sound delay is small compared to the image, which is also useful for movies and games.
Active Noise Reduction (ANC)
It is capable of active noise reduction, in which case it strongly suppresses ambient noise reaching the ear by emitting a sound wave of the same amplitude but opposite phase (antiphase) to the original sound. In other words, unlike passive noise reduction (e.g. earplugs, which only block out as much as possible), it analyzes noise and cancels it out.
It is good at this, up to 35 dB (taking active and passive noise reduction together). Also, there are three different ANC modes for different situations and noises.
Amplification of ambient sounds and speech
It's also capable of amplifying ambient sounds, as well as amplifying speech so you don't have to take the earphones out of your ears.
Battery, operating time
6 hours of use comes with one charge, which can be further increased using the charging box, to no less than 30 hours.
To charge, just insert the earphones into the charger.