Impedance 150 Ohms or higher. Provides regulated voltage for external CMOS dialer. Back side open dynamic stereo. Comes with extra set of ear pads, 6.3mm stereo adapter and carrying pouch. Weighs less than 2 oz.
Power cord slips into cigarette lighter socket.
600 Ohms impedance. Current 50-100 A. Impedance out approx. Can be hooked to ham radio through foot switch for hands-free applications. Includes RCA plug and adapter for 3.5mm mono. 1500 Ohms impedance, 12-foot cord, 3.5mm phone plug.