Sport Tactical 100 Electronic Hearing Protector Ear Protection NRR 22 dB, Ideal for Range Shooting/Hunting, -OTH. IDEAL FOR both indoor and outdoor shooters and hunters. VARIABLE SUPPRESSION TIME Allows user to adjust volume and gunshot suppression to help reduce echoes indoors. REDUCES BACKGROUND NOISE Actively filters background noise for clearer communication and hearing of commands. DURABLE RECESSED MICROS help to prevent damage and reduce wind noise. Low profile cups for rifle and shotgun use.