Howard Leight Impact Electronic Earmuffs - You deserve the best hearing protection, period. From technical innovations to educational initiatives to field verification, Howard Leight offers a suite of resources to make hearing conservation happen. These electronic muffs amplify range commands and normal conversation to 82dB while shutting out loud noises like gun shots. Uses Two AAA Batteries 4 Hour Automatic Shut Off 22dB Noise Reduction Rating Connects To iPod, MP3, And Other Devices Cushioned Headband Folds For Convenient Storage