Peltor Tactical 100 EarmuffsListen to MP3 or two-way radio while still hearing your surroundingsAdaptive frequency responseAdjustable suppression time reduces echoesIntuitive, easy-to-use controls2 AAA batteries required (not included)The Peltor Tactical 100 Earmuffs boast a 3.5mm jack for MP3 and two-way radio compatibility and limits sound levels to 22d. Audio-mixing feature allows you to listen to MP3 or two-way radio while still hearing the outside environment. Adaptive frequency response automatically reduces background noise and improves your ability to hear commands and conversations. Adjustable suppression time reduces impulse noise and echoes. Targets 22d NRR for passive sound protection. Premium polyurethane, synthetic leather, ABS foam and improved sealing ring offer all-day comfort. Intuitive, easy-to-use controls. Auto shutoff feature. Requires two AAA batteries (not included) for up to 200 hours of use. Imported.