Etymotic Research ER23-HF2-AN-A Universal Earphone Headset with Microphone--Black

Etymotic Research ER23-HF2-AN-A Universal Earphone Headset with Microphone--Black

• Close-proximity high sensitivity microphone. Achieves highest output sensitivity in its class with 105 dB SPL sensitivity at 1 kHz at 0.1 mV. 85%+ response accuracy from 20 Hz - 15 kHz.
• AccuDriver(TM) high performance, precision matched, balanced armature drivers. ACCUFilter(TM) User-replaceable filters that protect the balanced armature drivers
• Includes an assortment of noise-isolating ACCUFit eartip options to ensure proper seal and comfort. CUSTOMFIT option available.