FiiO F3

The translucent industrial-grade polycarbonate housing attracts by allowing you to peer into and appreciate the F3's internals. The lustrous, vacuum-ion electroplated shell of the F3 is also exchangeable, allowing you to spice up your life by letting you change between different shells to fit your current mood.

The F3 utilizes a cutting-edge graphene driver diaphragm. Graphene, with a thickness of only 0.335nm, is a new nanomaterial that is extremely strong and has excellent conductivity. Due to its properties, a graphene driver diaphragm can very faithfully reproduce your music - giving a clean, rich, yet transparent high-fidelity sound. 
A lighter voice coil makes for faster transients and better overall sound quality.

This exactly describes the Japanese copper-clad aluminum voice coil utilized in the F3, which allows it to present a transformative listening experience by clearly bringing forth even the subtlest of details within the music.