The Walker's Aplha Power Muffs Electronic Earmuffs features two wind resistant, high frequency, stereo microphones for precise sound directionality, sound activated compression, an anti-bacterial agent to prevent growth of mold and ultimate acoustic seal ear pads. The two independant volume controls allow for a customized experience. 5x Hearing enhancement, 50dg of power. Compact design is ideal for women, youth and smaller heads. 2 AAA (Included)