HOWARD LEIGHT IMPACT SPORT CAM EAR MUFF, 24DB RATING, CLASS 4 CAMOBuilt in directional microphones amplify range commands and other ambient sounds to a safe 82dB, providing more natural listening and enhanced communication Actively listens and automatically shuts off amplification when ambient sound reaches 82 dB; Noise Reduction Rating (NRR): 22 Features low profile earcups for stock clearance; adjustable headband for secure fit; compact folding design for convenient storage; Matte black color Includes AUX input