The Walker's Ultimate Alpha Power Muff Electronic Earmuffs provide excellent protection and comfort, and can be worn just about anywhere. The two hi gain omni directional microphones pick up sound equally from all directions, which preservers and enhances your ability to hear. The Alpha Power's are NRR rated at 26dB which protects against damage to your hearing, and the sound dampening composite housing keeps your ears comfortable. Whether its shooting a professional match or practicing at the range, the Walker's Ultimate Alpha Power won't leave you disappointed. FeaturesTwo hi gain microphones5x hearing enhancementPower - 50db2 independent volume controlsSound activated compressionNoise reducing rating, NRR 26dbCompact folding designAnti-microbial ear padsPower source 2 energizer 'AAA' batteries (included)