Electronic earmuff with 4 independent high frequency directional microphopnes, protection with the added benefit of sound amplification. Not only can you protect your hearing while shooting, you can still hear range commands and normal conversation without having to expose your hearing to harmful muzzle blasts. Automatically compresses harmful impulse and continuous noises to a safe hearing range below 85dB without clipping or cutting. Adjustable coolmax headband moves moisture away while providing cool comfort. Collapses for easy storage. This model has an input jack that allows you to plug in a CD or MP3 player.