Say hello to the Razor Slim XTRM series - a line of earmuffs that introduces an innovative cooling headband, a formidable Noise Reduction Rating (NRR) of 21 dB and groundbreaking sound-activated compression (SAC) technology with an astonishingly fast 0.02-second response time. This cutting-edge SAC technology skillfully moderates loud sounds like gunshots to safer levels while maintaining crucial auditory awareness. You can now say goodbye to complete noise isolation, as you'll effortlessly catch range commands and stay connected with hunting companions even amidst the noise of shots. Prioritize the protection of your irreplaceable hearing by choosing Walker Razor Electronic Earmuffs for your next journey into the wilderness or trip to the shooting range. And don't forget, the package includes 2 AAA batteries for your convenience.