The 3M Peltor 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 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.NRR: 22 dB noise reduction ratingIDEAL FOR both indoor and outdoor shooters and huntersVARIABLE SUPPRESSION TIME reduces echoes indoorsADAPTIVE FREQUENCY RESPONSE reduces background noise for clearer conversation and hearing of commandsDURABLE RECESSED MICROPHONES prevent damage and reduce wind noiseADJUSTABLE HEADBAND added padding for a comfortable fitRUNS ON 2 AAA BATTERIES