In the reviews, many wrote about the regrets of the lack of the aptx codec compared to the 3rd model, that there is now a different converter, the 10th Windows sees only sbc and it, and does not support ldak and similar Windows (although they promised something in the 11th) and so on. So this makes no sense, Internet music mp3 often does not give out more than 320 kbps, or for a lot of money, on expensive subscriptions, but for this money you will go broke on flac and download and take "pioneers" for sound recording, and then, even a non-professional won't see the difference. The sbc standard somehow supports 1500 kbps, plus the buffer of the headphones themselves, minus the fact that it automatically cuts the quality in case of a bad connection (automatically restores and plan b: solved by rebooting one of the devices). On the street, with no noise reduction, you will not hear the quality of a studio, and again, only a super-profi cuts the ear with a placebo effect. The same 2 devices, when working simultaneously, use only sbc. So there is no point in paying a 360 subscription for some additional functions. if you want, take aux and listen. Read the difference with the 5th model and understand why the 4th is better. And aptx in the 3rd, stupidly due to the Qualcom processor in the receiver and the DAC, because this is a closed qualcom codec, not all devices support it so well, especially now and, again, this is the same sbc with slightly different frequencies and timings for communication with devices.