Description At the range or on the hunt, the Howard Leight Impact Sport Electronic 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. Patented Air Flow Control technology allows for a slim earcup design that ensures your firearm stock has clearance while shooting. The padded headband features telescopic height adjustment for a comfortable, customized fit. An external audio jack lets you connect the shooting earmuff to an MP3 player, scanner or other audio source. The battery delivers approximately 350 hours of usage, and the automatic shut-off feature engages after 4 hours to help save battery life. All Howard Leight electronic earmuffs and safety eyewear are compatible for use with each other. Attributes Built-in directional microphones amplify range commands and other ambient sounds to a safe 82dB Actively listens and automatically shuts off amplification when ambient sound reaches 82 dB; Noise Reduction Rating (NRR): 22 Efficient, low-energy consuming with 4-hour shut-off, delivering 350 hours of battery life. AUX jack connects to MP3 players and scanners Up to 4X amplification makes it easy to hear range commands and conduct conversations Provides more natural listening and enhanced communication Internal circuitry automatically shuts off dangerous impulse noises above 82dB More Information Color: Red/White/Blue Primary Color: Red/White/Blue Material: ABS Country of Origin: China Unit of Measure: EA Item LxWxH: 8.75 X 4.50 X 9.13 Shipping LxWxH: 7.00 X 5.50 X 4.50 Weight: 1.1