With Sound-Activated Compression and Adjustable Frequency Tuning, these muffs compress loud noises to safe levels and permit you to adjust frequencies. Muffs have 50db of power with a maximum output of 110db and offer an NRR of 24db. Specially contoured shape eliminates interference when shouldering a gun. Individual volume controls and are powered by two 1.5-volt batteries (included). Camo patterns/Colors: Mossy Oak®, Realtree®.