Slim, low profile muffs. 23 decibel protection rating. Features sound activated compression and omnidirectional microphone technology for maximum environmental sounds at a safe volume level. 5x amplification. Ultra-fast attack time of 0.5 millisecond offers optimal noise blocking over 82dB while minimizing interruption of ambient hearing. Adjustable headband. Ultra-comfortable gel ear cups ensure a tight seal even with glasses. Easy, replaceable ear cups with snap-in design. LED light power indicator. Aux jack and cord included. Requires (2) AAA batteries (not included). Boxed.