I think so too. When this model was released on the official websiteцмф.тех I think so too. When this model was released on the official website of the CMF.TECH and the reviews indicated that the bluetooth version 5.3. Then, when the CMF website stopped working and all the CMF products were transferred to the site, nothing.TECH was indicated there, the bluetooth version 5.4 was indicated. When I bought my headphones in June, they were the last on the site for 45€. Now there is an updated version that costs more. Why doesn’t the company say anything incomprehensible?