Cowboom has the Etymotic Research ER23-HF3 Noise-Isolating Headphones w/ Mic (Cobalt) on sale for $57 with free shipping. Features 20Hz - 15kHz frequency response, 105dB sensitivity, 16 ohms impedance, and up to 42dB noise reduction.

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    1. $113
    2. $90
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    4. $57
    Ben's Price
    • Etymotic Research hf3 Headphones w/ Mic $90 at Amazon
    • $90
    • Etymotic Research hf3 Headphones w/ Mic $113 at Best Buy
    • $113
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