Walker&rsquo;s Razor Slim Electronic Hearing Protection Muffs with Sound Amplification and Suppression. &ldquo;Protect It Or Lose It!&rdquo; Razor" ultra-thin rubberized cups Two Omni Directional Microphones Provides sound Activated protection over 89 dB at 0.02 reaction time Noise reduction rating of 23dB Operates on 2 'AAA' batteries- included Razor Ultra-Thin Rubberized Cups Two Omni Directional Speakers Provides Sound Activated Protection over 89 dB @ 0.02 Reaction Time Noise Reduction Rating of 23dB Operates on 2 AAA batteries- included