Hamilton Electronics HA7 SchoolMate Deluxe Stere - Mono Headphone with 1 - 8 in. Plug and 1 - 4 in. Adapter, Hamilton Electronics (He) Corporation, Mfr#: HA7

The Hamilton HA7 Headphone features four-in-one operation on 1/8 inch stereo, 1/8 inch mono, 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. Specifications: • Impedance: 170 ohms • Speaker drivers: 57mm cobalt magnet type • Headphone frequency response: 18-20k Hz • 3 Meter Cord •