Etymotic Research GSP1 GunSport Pro Series Electronic Earplugs Provides optional gain for (only) soft sounds Protects ears from firearms and explosive blasts Includes: 1 pair of GSP1 electronic earplugs, assortment of ready-fit eartips and filter removal tool, extra wax filters, headband for wind noise reduction, pouch, 1 pair ER-20 High-Fidelity Earplugs (passive), 6-month supply of batteries (Standard 312 Hearing Aid Battery - available on Amazon.com) International CES 2011 Best of Innovations Winner for Design and Engineering - Health and Wellness Allows normal detection and localization of even the softest sounds