The hf2 delivers Etymotic world-renowned sound quality in a comfortable, convenient wireless phone headset.Etymotic hf2 iPhone compatible in-ear earphones. High end in-ear monitor style earphones with high-fidelity audio for a near perfect music experience. In-line microphone and the music mutes for communication Works with iPhone and other music phones that operate with a 3.5 mm/4-contact phone + stereo plug. Compatible with most music players (e.g., iPod, mp3, CD) that accept a 3.5 mm stereo plug.
Colour : Cobalt (Blue).
Compatible with iPhone and other mobile phones.
Response accuracy of Etymotic's ER-4 earphones.
Highest noise isolation of all competing headsets.
3.5mm stereo plug makes the hf2 compatible with any music player.
Frequency response-20 Hz -16 kHz.
Noise isolation-35- 42 dB (depending on eartip used).
Acoustic polarity: + electrical = + acoustic.
Transducer type-Balanced armature.
Sensitivity (1 kHz)-105 dB SPL for a 0.1 VRMS input.
Impedance-16 Ohms (nominal).
Maximum output-120 dB SPL.
Maximum continuous input-0.55 VRMS.
Microphone sensitivity: 40 dB V/Pa.