Description The Walker's Razor Patriot Electronic Earmuffs feature a Noise Reduction Rating (NRR) of 23 dB, and utilized sound activated compression (SAC) of 0.02 seconds. SAC is a special electronic circuitry that will compress gun shots and other loud noises down to a safe level, without completely shutting the noise off. This allows you to hear range commands or communicate with your hunting partners, even when shots are being fired around you. Your hearing cannot be replaced, so make sure you pick up a set of Walker's Razor Patriot Electronic Earmuffs for your next trip to the woods or range.PRODUCT DETAILS:Omni Directional Microphones Low Noise/Frequency Tuned for Natural Sound Clarity Full Dynamic Range HD Speakers for Clear Balanced Sound Sound Activated Compression 0.02 Second Reaction Time Sound Dampening Composite Housing Patriot Patch Compatible Audio Input Jack Firearms, trailers, and some accessories are only available for purchase in stores. Each location follows all BATF and individual state/county/city laws to insure the desired product is legal for sale. Any info provided online is subject to change, please go to your local store for more accurate information.