The world's most accurate noise-isolating headset and earphones under $100! The mc2 delivers on this promise and provides you with the best-in-class performance benefit for your money. With the mc2, you get 85%+ response accuracy, meaning you will hear what you were meant to hear. The mc2 delivers tight, accurate bass with crystal clear high-frequency detail at all listening levels. You'll experience 35 dB- 42 dB of noise isolation, which is the documented highest noise isolation of any earphones or headphones on the market today. The mc2's feature a close-proximity high sensitivity microphone and is made to work with smart phones and tablets from Blackberry, Samsung, HTC, Motorola Mobility, HP, and of course, Apple. Etymotic's mc2 looks and feels great, too. With a high-gloss polished black aluminum finish, the mc2 ships to you with an assortment of noise-isolating ACCU-Fit ear tips options to ensure proper seal and comfort. You even have the option of ordering CUSTOM-Fit earphones!