Volume Management Technology manages output volume from portable audio devices at 82 dBA (based on sound output levels no greater than 126mV). Provides ideal protection in most low to medium hazardous noise levels. Plugs into most MP3 players, mobile phones, and other personal audio devices. Sleek diamond pattern headband looks cool and is easy to clean. Stereo earmuffs provide excellent sound quality. Reinforced fork slides with handholds for easy and comfortable fit. Ideal for use at work and at home.