Peltor Sport Tactical 100 Electronic Hearing Protector, Ear Protection, NRR 22 dB, Ideal for the Range, Shooting and Hunting, TAC100-OTH, Black, One Size. IDEAL FOR both indoor and outdoor shooters and hunters. VARIABLE SUPPRESSION TIME reduces echoes indoors. ADAPTIVE FREQUENCY RESPONSE reduces background noise for clearer conversation and hearing of commands. DURABLE RECESSED MICROPHONES help to prevent damage and reduce wind noise. ADJUSTABLE HEADBAND includes added padding for a comfortable fit. RUNS ON 2 AAA BATTERIES (not included). The 3MT PeltorT 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 PeltorT Sport 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.