The Radians Sound FX electronic earmuffs provides both hearing protection and an AM/FM Radio for entertainment in one device. Ready for use in a variety of applications, this adult-size headset has tuning and volume controls for easy adjustment; built-in antenna for superior reception; and an adjustable wide-padded headband for a secure, cushioned fit. Foam-filled earcups provide a comfortable fit, even while wearing safety glasses. An auxiliary jack allows you to plug in your MP3 or CD player. NRR Rating: 22. Operates on 2 AA batteries (not included). Black.