Howard Leight Impact Sport Electronic Earmuff Camoflage . AUX jack connects to MP3 players and scanners. Up to 4X amplification makes it easy to hear range commands and conduct conversations while internal circuitry automatically shuts off dangerous impulse noises above 82dB. Air Flow Control technology enhances the Noise Reduction Rating. Convenient folding headband design for easy storage. Specifications for Howard Leight Impact Sport Smoked Black Elec Muff Nrr22: Manufacturer: Howard Leight Color: Camoflage NRR: 22 dB Package Contents: Howard Leight Impact Sport Smoked Black Elec Muff Nrr22 Howard Leight Impact Sport Smoked Black Elec Muff Nrr22