FACT one should know in Bluetooth's People usually perceive that sound travels better through wires than through space. They believe that the quality of sound suffers when it travels without cables. In a way, they are right. However, advancements in technology have changed this perception. The AptX coding technology has made it possible for transmitting sound effortlessly without any loss in quality through the wireless medium. The good wireless earphones come with in-built----AptX encoding technology--- to ensure excellent sound quality. Hence, it is advisable to check out if your earphones come with AptX coding technology before you purchase them.