I stuffed audio transmitters around the apartment (to a TV, two computers) . I go - I listen to music and rejoice . Transmitters without an external antenna - they penetrate up to 10 m - through 2 rails. walls. And with an external antenna, with version 5.3 - it works quietly at any point. With its pros: Tried in tandem with smartphones, audio transmitters (both via AUX cable and via USB). It mates without problems and dances with a tambourine. Charges quickly. His declared 4 hours of work - holds, longer - just did not try. The sound quality is a pleasant surprise. A bit lacking in bass, but that's in comparison to Sennheiser's wired HD-650. In the ears they keep normally, for a couple of weeks - they never flew out. Well, the cost, of course, is sane (3k with a ponytail, compared to branded ones (more precisely, delusional ones), for 10-25k with the same functionality. Has some cons: You can find fault with anything, but I didn’t find any reasonable shortcomings.