I came across a marriage - after a couple of months, the left earpiece stopped showing signs of life. The headphones themselves came in an opened package, traces of operation are visible on the case - the plate with the model number and other information has been erased. When I downloaded the application and connected it to the mobile, I saw a list of previously connected devices. sends to guarantors. Ahead of communication with the guarantors. Purchase experience ruined. I can’t advise the seller, if only because he didn’t even properly pre-sale preparation for used. product that sells as new.