Dobrý den, koupila jsem u Vás bezdrátová sluchátka. Ke sluchátkům nebyl český návod, což by nebyl ten největší problém. Sluchátkům nejde upravit hlasitost. Tam kde by měla být hlasitost na obrázku, se v reálu nic neděje. Prosím o info jak funguje hlasitost na sluchátkách Java cellularline. Díky P.P.
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