Walker’s Power Alpha incorporates highly advanced technology providing you with unsurpassed sound quality, excellent speech clarity, superior hearing protection and sound enhancement. With a Noise Reduction Rating on 24 dB the power muffs Alpha help protect your hearing from sudden or sustained loud sounds. Additionally, the electronic Sound Compression circuitry provides an additional layer of protection. The Power Muff Alpha amplify sound up to 5X your normal hearing with TWO microphones providing improved sound directionality.