Get Hamilton Listening Centers in our new laminated Carrying Box, This light-weight laminated carrying case is ideal for any classroom setting, This listening center includes:, (8) Hamilton HA5 Headphones: The Hamilton HA5 Headphone features two-in-one operation in 1/4 in stereo and 1/4 inch mono modes, New soft leatherette style washable replaceable ear cushions new easier-to-wear lighter design with swivel ear-cups and soft coil 3 meter long cord (almost 10 feet!) all contribute to longer fatigue-free use, Now in easy to mark medium gray colors, Use in groups with a listening center jackbox, Headphone Specifications: Impedance: 170 ohms, Speaker drivers: 57mm cobalt magnet type, Headphone frequency response: 18-20k Hz, 3 Meter Cord, One (1) year warranty, (1) 8 Position Jackbox with Volume Controls (1) Laminated cardboard carrying box SKU: HMEBLI059