Jackson’s Silencio® REACT with Active Listening and AM/FM Stereo Radio earmuff features an auxiliary input port for a walkman, MP3, CD player or two-way radio. The electronic muff includes 4-hour auto shut-off, digital circuitry, and sensitive microphones and full stereo for excellent sense of direction. Selector switch can be set to hearing, radio or combination.Jackson Products Inc., www.jacksonproducts.com, (800) 253-7281