The Etymotic Research hf3 headphones are a set of in-ears with a remote & mic.
The headphones have the small ear buds and triple-flange sleeves that's typical of Etymotic headphones.
The remote & mic is a bit minimalist. The volume toggles are the outer two buttons, and while they have tiny embossed arrows to differentiate them from the playback control button, it's easy to hit the wrong button if you're not looking.
|Driver Type||ACCU•Driver™ High-performance balanced armature|
|Sensitivity (at 1 kHz)||105 dB|
|Impedance (at 1 kHz)||16.0 Ohm|
|Frequency Low||20 Hz|
|Frequency High||15000 Hz|