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. With improved performance, enhanced comfort features and greater functionality – including a tethered battery door, streamlined design and enhanced electronics – the Peltor Sport Tactical 100 Electronic Hearing Protector combines innovative 3M technology with the trusted Peltor Brand to give shooters and hunters a new hearing protection experience. Adaptive Frequency Response for clear conversations. Variable Suppression Time for optimized echo reduction. Re-engineered headband for comfort and fit. Low-profile cups for rifle/shotgun use. Durable, recessed microphones to reduce wind noise. 2-hour auto shut-off and low battery indicator. Easy-access battery door with tether (Runs on 2 AAA batteries). 3.5 mm audio input jack compatible with most MP3 and 2-way radios. Low profile with cut-outs. Medium profile with cut-outs. 3.5 mm Audio Input Jack. Variable Suppression Time (Manual). Dynamic Suppression Time (Automatic).