Walker's Game Ear Alpha Muffs Compact incorporate advanced technology for unsurpassed sound quality, excellent speech clarity, superior hearing protection and sound enhancement. These compact muffs amplify sound up to five times normal hearing with two high-frequency stereo microphones for improved sound directionality. Sound-activated compression reduces loud sounds, like muzzleblasts, to safe levels for a noise reduction rating of 24dB. Features include adjustable frequency tuning, two independent volume controls for true stereo sound, ultimate acoustic-seal earpads with antibacterial agent and a sleek carbon finish. The compact, slim design is ideal for women, youth and smaller heads. Powered by two AAA batteries (included).