DESCRIPTIONAt the range or on the hunt, the Howard Leight by Honeywell Impact Sport Sound Amplification Electronic Shooting Earmuff keeps you protected from hazardous noise and connected to your environment. It carries a Noise Reduction Rating (NRR) of 22 in both on and off mode. When the electronic ear protection is switched on, it employs 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. For additional shooting hearing protection, it also actively listens and automatically shuts off amplification when loud impulsive sounds like firearm discharges reach 82 dB.