Peltor Sport Tactical 300 Electronic Hearing Protector, Shooting Ear Protection, NRR 24 dB, Ideal for Shooting, Hunting, Construction, and Work Shops Black. IDEAL FOR both indoor and outdoor shooters and hunters. DYNAMIC SUPPRESSION TIME measures the energy in gunshot noise and automatically sets suppression time for reduced echoes and increased comfort. CLEAR VOICE TRACKING seeks voice within background noise and actively filters noise for improved speech intelligibility. DURABLE RECESSED MICROPHONES prevent damage and reduce wind noise. VENTED HEADBAND adjustable, improves comfort when worn with hats. O BOX AND Outside of the Continental US.