As for the construction, the headphones are of extreme quality and very well built, made of metal material, it seems to be aluminum, the cable seems to be very resistant.
The only complaint is that the rubber that comes with it is not made of silicone and is made of a kind of hard material, it seems to be rubber, which can bother you.
As for the sound, it is the best headphone I've ever used. The graves are very defined, and the subgrants are present, but in the right measurement, without any surfaces that end up absorbing other frequencies, hot and well-defined intermediaries, and sharp ones are shiny and defined.
Compared to the other headphones I have already used, much superior to Qkz Ak6 regarding the definition of heavy and heavy media, but loses subgraves, which ends up being better for definition of songs in general because there are no subgraves left.
The sound is very similar to the KZ EDX, but much more defined in a general way and with more apparent and defined graves.
It's not even compared to any Bluetooth headset I've ever used, Xiaomi Yearbudy or Dots. He is much better than they...