Etymotic Research MC5 Noise-Isolating In-Ear Earphones The Etymotic MC5 noise-isolating headphones deliver tight, accurate bass with crystal clear high-frequency detail at all listening levels Sleek and stylish 8mm neodymium drivers redistribute energy to smooth peaks and compensate for weak highs Reinforced 4 foot cable and 3.5mm stereo jack 35 to 42 dB of noise isolation with a max output of 120 dB Includes an assortment of eartips for a comfortable fit and carrying pouch