High-end offering from German headhpone company 'Manta' (manufactured by Calrad Imports Inc.*) in 1974. *Reference Needed Impedance Rating in Ohms 4.0 minimum and 16.0 maximum Frequency Response Range Hz 30.0 to 15000.0 Headset Cord Length 84.0 inches nominal Earphone Element Type Dynamic Earphone Cushion Material ...
Connectivity Technology: Wireless Earpiece Design: Over-the-head Wireless Technology: Infrared Includes 2 pairs of headphones
Two pairs. Wireless with infrared transmitters