The FiiO EX1 is the perfect complement to FiiO's high-resolution players as well as to all other portable playback devices such as MP3 players, CD players, smartphones, or tablets. The heart of an earphone is the driver diaphragm. The developers of the FiiO EX1 discovered that titanium, which is often used in aerospace, is extremely lightweight yet very stable and has excellent sound conduction properties. FiiO has succeeded in developing a dynamic wideband driver made of titanium, which significantly contributes to the very beautiful natural and powerful sound profile of the EX1. The Japanese Audio Society has awarded the EX1 2nd gen the "Hi-Res Audio" certification, as it is capable of producing 40 kHz tones and has passed all important quality tests. The headphone cable of the FiiO EX1 2nd gen features an integrated microphone for phone calls as well as a remote control to manage the music. The microphone and calling function are compatible with both Android and iOS systems.