Walker’s Razor Slim Ultra Low Profile Compact Design Earmuffs provides the best shooting hearing protection with the introduction of advanced digital circuitry & nano tech water repellence. With an impressive noise reduction rating (NRR) of 23dB. This Razor series will let you clearly hear everything going on around you without interfering in the protection of your natural hearing abilities. The HD speakers have an ultra-clear balanced sound, so when the 2 HI-Gain omnidirectional microphones pick up outside noise, you will be able to determine what sounds to clue into and those that can be ignored. Walker’s Razor Slim Ultra Low Profile Compact Design Earmuffs feature extra slim ear cups and a comfort fit headband for all day shooting, and for a secure fit. The sound activated compression has a blazing fast 0.002 second reaction time with a recessed independent volume control knob. The headband is a padded metal wire frame with rubberized coated earmuffs that prevent damage to the interior electronics. An audio input jack is available for you to plug in your favorite source for music or sounds, effectively converting from earmuffs to headphones all while keeping your hearing protected. You will need 2 AAA batteries to operate these earmuffs. BATTERIES ARE INCLUDED!