At the range or on the hunt, the Howard Leight by Honeywell Impact Sport Sound Amplification Electronic Earmuff keeps you protected from hazardous noise and connected to your environment. These earmuffs carry a Noise Reduction Rating (NRR) of 22 in both on and off mode. When the electronic ear protection is switched on, they employ built-in directional microphones that amplify ambient sounds to a safe 82 dB. This allows you to hear important commands on the range and crucial environment sounds when hunting. As an added safety feature, they also actively listen and automatically shut off amplification when loud impulsive sounds like firearm discharges reach 82 dB.