The Sigma Electronic Earmuffs are designed specifically for shooting enthusiasts featuring 24 NRR rating protection with advanced ambient sound amplification and 85dB sound compression technology for optimal hearing protection without losing situational awareness.Sigma Electronic Hearing Protection Earmuffs in Gray/Black24 NRR Rating for superior noise reductionBlocks harmful noise above 85dB with 0.02 second response timeStereo amplification enhances range commands and quiet ambient soundsDigital compression circuit with dual microphonesAdjustable volume controlCushioned adjustable ear cups with padded headbandCompact folding design for portabilityPowered by 2 AAA batteries (not included)Perfect for shooting ranges hunting and other high-noise environments where communication and hearing protection are both essential for safety and performance.