This cord is hypersensitive and the battery is very small. I would say smaller than many other bt devices on the market. The noise cancellation is a joke. It categorically refuses to connect with many mobile phone brands. The silicone that makes up half of the bt body easily breaks or cuts at the point above the microphone or at the bend at the top where it sits on the ear.
If a button is lost? Forget it, throw it away, the company gentlemen will call you and get a new one. But sir, it's functional, only the pick/hang button is lost, it didn't break or damage the whole thing. It doesn't matter. Our company does not cover such repairs (of course insignificant to them). Therefore, please replace it with a new one. And if the same thing happens with this one? Well, you'll have to replace it with another one.
So, poor user of this device, cursed be the hour you chose to buy it, throw more coal in the stove because it burns quickly.
The service that some mentioned here as perfect, I call it RIDICULOUS, because when I contacted the responsible people for repairs, they told me to buy another one.
The warranty that this device supposedly has is completely useless since it only covers the removable part of the earpiece, which I can also buy from various stores WITHOUT the need for any so-called warranty.
The sound is relatively good, but most of my conversation partners complain that they constantly hear me from a distance, they hear muffled sounds.
You can't use it for music, of course, because it's only for voice.
The 7-hour talk time I find very low, considering that many other devices of the same type last at least 12 hours of non-stop talk. Charging it for such a small battery is time-consuming to the point of nausea.
The charging contact piece, a failed idea from Plantronics, is the worst I have ever seen. Instead of releasing it with micro USB or USB-C, etc., the gentlemen decided to stick a tiny piece that, if you lose it, will cost you a fortune in many cases.
I don't have much to say because I would need a book to write it all, I simply DO NOT recommend it for everyday use, because after a while, you will be pulling your hair out for no reason and crying over the money you wasted on this ridiculously expensive (without reason, of course, for what it offers as a device) so-called bt device.