Radians Sound FX Electronic AM/FM Radio And Hearing Protector. Adjustable wide-padded headband provides secure and comfortable fit. Foam filled earcups provide a comfortable fit when wearing safety glasses. Comes standard with Auxilliary Jack for MP3 or CD player (cord not included). Tuning and volume controls with AM/FM power switch. Built-In Antenna provides excellent AM/FM reception. NRR Rating 22. Operates on two AA batteries (batteries not included).