1. Working hours. Headphones are constantly discharged. Unfortunately, they were not disconnected from the cable, almost never. The charge lasts for 2-3 hours. And for charging, micro-usb is used, which tends to “loose” over time, which leads to the fact that when you play and charge the headphones, they constantly fly off the charge. By always, I mean ALWAYS! And this is subject to careful operation. The headphones lose the USB connection, then it takes a very long time to initiate it, and if the USB is connected to the PC, as it was with me, you will hear constant USB connection-disconnect notifications, and at some point, initialization simply will not occur and you will see the error "USB device not recognized" and this will continue indefinitely, exactly until you literally lose your temper, remove the headphones and let them charge at least 10%, otherwise it will listen to the sound of turning the headphones on / off , connect/disconnect USB.
2. Microphone. It is only activated when it is pulled out of the headphones and deactivated in the same way. However, the on / off works with a slight movement of the microphone, that is, if you suddenly want to nod your head, scratch the left side, you are guaranteed to accidentally touch the microphone in 90% and, as it were, turn it off. Doesn't seem to be a problem? Yes, but only if you do not use Discrord or Telegram for communication, after activating / deactivating the microphone in the above programs, it stops working, exactly until you remove the USB adapter from the PC and plug it back in, otherwise nothing. And I checked it on two different PCs, with different OS.
3. Connection. When you turn on the PC, the headphones can connect to the PC for several minutes, and in the meantime you methodically move the on / off button, hoping to initialize the connection.
4. They do not sit comfortably, they squeeze their heads.