Introduction
Etymotic's hf2 is a redesign of the company's hyper-accurate ER4P in-ear headphones, adding iPhone compatibility via an inline mic and call button. At $179 USD, the hf2 aims squarely at iPhone owners who are audio purists and favor 256Kbps or higher MP3s or Apple Lossless files. If you’re outside that listening group, you’re better off checking out cheaper headsets from Shure or V-Moda.
The hf2 is compatible with iPods and many other music players, though the inline controls only work with the iPhone. Also, they didn’t work properly as regular headphones with our 160GB Archos 705 WiFi (we only got one channel of audio). If you've run across more incompatibility issues, let us know in the comments!

As you'd expect from a company that designs hearing aids, Etymotic put a lot of effort into call quality.

by AJ on July 31, 2008:
“I got a pair of these Hf2s after reading the reviews. Sound was indeed great for the first few hours... then they came apart. Well, I unfortunately snagged the cord on the desk. They did not pop out of the ear as one expects with other in ear designs, instead...” More...