They turn off 10 minutes after the loss of communication with the source. Or after 30 minutes if no sound is played. Has pros: 1) The call quality is good. I freely walk around the apartment. When there are two walls between me and the phone, interference appears. If you are in the same room with the phone or in the next one, the sound is always of the same quality. 2) I compared the sound quality with the AKG 240 Studio (JBL also connected via wire). Didn't find a significant difference. 3) The cups are full-sized, inside 40*55 mm - the ears are fully included. But not too big - the headphones can be hung around the neck, they do not interfere. 4) Good microphone, you can hear me perfectly. At least at home. Didn't use it on the street. 5) The battery capacity corresponds to the declared one. I have enough for a week. 6) There is an emergency connection option - by wire. The microphone also works. 7) Foldable design. Its cons: 1) Curve assembly or workmanship, I don’t know. Immediately one of the pads on the bow began to snap off (see photo). I had to tape it up. 2) They sit too tightly, stick directly to the ears. This is both a plus and a minus. The advantage is that they do not fly off under any circumstances. I do warm-ups in them, I rarely have to correct them. But for me it's still a drawback. At first it was very uncomfortable, even painful. After a week, I started to get used to it, but my ears still get tired, by the evening there is a feeling of deafness. Too well isolated from external sounds, you can not hear conversations and steps around. 3) Strong smell for the first 2-3 days. 4) ate 24-04-2022. After 10 months of use, one ear cushion began to slip (pictured). Dropped it off at the store. The JBL service center recognized the marriage, the money was returned. Thanks to them for this. But it's a pity that such quality.
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