Battery: Operates on two AAA batteries Rating: Delivers an impressive noise reduction rating (NRR) of 23 dB Functionality: Engineered to have a low profile without compromising hearing protection Bundle Includes: Walkers Razor Slim Electronic Muff (Light Teal) with Walker's Crosshair Sport Shooting Glasses (Clear) Ergonomic Design: Features two omnidirectional microphones to assure that you don't miss anything and get crisp clear audio