Introducing the 3M(TM) Peltor(TM) Sport Tactical 100 Electronic Hearing Protector, with improved performance, enhanced comfort features and greater functionality. Featuring proprietary 3M technology that suppresses harmful gunshot noise while amplifying low level sounds, the Peltor(TM) Tactical 100 Electronic Hearing Protector is ideal for both indoor and outdoor shooters and hunters. Adaptive Frequency Response reduces background noise for clearer conversations and hearing of commands. Plus, the Variable Suppression Time feature provides optimal echo reduction in indoor shooting environments. *Please note this is not a noise cancelling hearing protector. Features: NRR: 22 dB noise reduction rating Ideal for both indoor and outdoor shooters and hunters Variable Suppression Time reduces echoes indoors Adaptive Frequency Responce reduces background noise for clearer conversation and hearing of commands Durable Recessed Microphones prevent damage and reduce wind noise Adjustable Headband added padding for a comfortable fit Run On 2 AAA Batteries (not included) Easy-access battery door with tether (Runs on 2 AAA batteries) 3.5 mm audio input jack compatible with most MP3 players and 2-way radios