Designed for shooting enthusiasts, these earmuffs offer ambient sound amplification for clear communication and an innovative sound compression feature that activates above 85dB-ensuring you're safeguarded from hazardous noise without being cut off from your surroundings. 24NRR Rating Blocks Noise Above 85db Stereo Amplification Enhances Range Commands Or Quiet Ambient Sounds Digital Compression Circuit Blocks Harmful Sounds With 0.02 Second Response Time Dual Microphones Adjustable Volume Adjustable Cushioned Ear Cups Folding Compact Design With Padded Headband Uses 2 AAA Batteries (Not Included)