The LS-4.4A cable has been specially developed for the FiiO "Little Conch" series, in particular the FD11 and FH11 models. It uses 0.78mm 2-pin connectors, which are not directly compatible with the FiiO FH3, as it requires a different type of connector. It is therefore unlikely that the LS-4.4A cable will fit the FiiO FH3 directly.