Introducing the Razor Slim XTRM series, showcasing an innovative cooling headband, a formidable Noise Reduction Rating (NRR) of 21 dB and groundbreaking sound-activated compression (SAC) with a rapid 0.02-second response time. This advanced SAC technology expertly moderates intense sounds like gunshots to safer levels, while maintaining crucial auditory awareness. Say goodbye to complete noise isolation, as you'll effortlessly catch range commands and stay connected with hunting companions even amidst shots. Safeguard your irreplaceable hearing by opting for Walker's Razor Electronic Earmuffs on your next journey to the wilderness or shooting range. The package includes 2 AAA batteries for your convenience.