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! And now, available for the mc2, you can download the AWARENESS! for Etymotic app from iTunes. AWARENESS! for Etymotic is an innovative earphone app for anyone who uses an Etymotic hf3, hf2, mc3. mc2 or ETY-Kids headset or Etymotic earphones and needs to hear sounds around them. AWARENESS! for Etymotic listens to your surroundings while you listen to music. Any sound louder than normal background noise can be heard in your earphones. It's not just a stand alone app. AWARENESS! for Etymotic runs in the background and monitors sound while music and media players, audiobooks and games are in use. Once you receive your earphones, to use AWARENESS! for Etymotic, follow these steps: 1. Download the AWARENESS! for Etymotic app from the iTunes App Store. 2. Register at Etymotic's website (etymotic.com/awareness) to unlock all features. 3. Enter the code emailed to you in the AWARENESS! for Etymotic App. And enjoy your music safely!