Built-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 stops amplification when ambient sound exceeds 82dB; Features low profile earcups for firearm stock clearance; adjustable headband for secure fit; compact folding design for convenient storage; Includes AUX input and 3.5mm cord to connect with your music device or radio scanner or another audio source; Includes 2 AAA batteries; automatic shut-off feature after 4 hours increases battery life; approximately 350 hours of battery life; Noise Reduction Rating (NRR): 22dB