The Flyo X5III is a dual AK4490 decoder, as well as the AK380 from Aileho, the AXON Sky7 mobile phone, the new \"VALOQ\" from Venturecraft, and so on. In fact, the decoding chip itself can not manage a few money, does not mean that the use of a good chip sound quality is good, is HIFI. For example, the AXON Tianji 7 mobile phone is not a HIFI. We can often see that when some domestic brands introduce their HiFi mobile phones at the press conference, they will claim to use a very excellent decoding chip. For example, when Meizu released MX4PRO in 2014, it focused on the ESS9018K2M chip, and by the way, it opposed HIFIMAN's flagship HM-901 at that time, and claimed that the overall sound performance was 4 times that of it. In the release of AXON Tianji 7, ZTE also mentioned that the machine and the Yuan player AK380 use the same AK4490 decoding chip.