The Ultimate Ears Super.fi 5 Pro is a universal earphone. With the same sonic signature as the professional custom series (the UE-5 Pro is based on this model), the Super.fi 5 Pro is a very musical, bass full IEM. Featuring a 2-driver armature design, the Super.fi 5 Pro can reproduce the same frequencies full sized headphones can. Like most high quality, low impedance IEMs, the Super.fi 5 Pro improves with a good source and dedicated amplifier to sound its best. A great price:performance point in the UE line-up, the Super.fi 5 Pro are a popular IEM for aspiring audiophiles on-the-go. At $249.99, these are a great option for high fidelity travel and on-the-go listening, with a decent amount of background noise isolation. Comes in black, clear, and white.