How to buy hidden headphones (headset)?

Question

Android

I want to buy a hidden headset or headphones. So that they can be used with an android phone. Never bought before. On Ali, for this request, some strange things - with wires, battery connectors - do not look like a regular headset.

Also some not so good reviews.

in general, a low price, and it is worth taking a leash for informational purposes. the product is not suitable for the use of its intended purpose, the winding antenna has an extremely weak signal, and as a result, the sound is barely audible,,, and special thanks to the seller, I returned half the money ...

I don't even know what an antenna is.
there are also offers of ordinary bt headsets, but they seem to be too noticeable. What to buy?

Answer 1

On Ali, for this request, some strange things - with wires, battery connectors - do not look like a regular headset.

The battery is needed for the antenna to work. The antenna is something like a thin hoop (collar) that is hung around the neck, and "headphones" are placed in the ears. I say like, because it's just a small piece of iron that starts to vibrate from the signals coming from the antenna, and thus transmit sound to your ear membrane (oscillations).
In general, I would not advise, a terrible thing that can tear the eardrum

Answer 2

Everyone has different legislation - all sorts of funny guys can come to visit.
It’s easier to assemble an earpiece yourself from improvised materials, or finish this one.
There may be interference in full-size headphones, from people sitting nearby.

Answer 3

Ali has more. Are these headphones safe?
A. Or are they the same? Also dangerous?
It turns out the best option to take bt?