Just like the sportcasters use! Works with Computers, Telephones, Internet, Broadcast Gear etc. 16,000 to 22,000 Hz. 32ohms. Microphone; 42 +/- 2dB. 6ft cord length. Comes with dual mini plugs, (mic and headphones). In-line volume control. Adjustable, thickly padded, ultra comfortable headband. Also, thickly cushioned, ultra comfortable, earphones. These earphones are hinged to offer maximum range of movement to fit snugly. This snug fit prevents sound-escaping gaps. You can wear these for hours! Very attractive blister packaging for quick retail sales. Engineered in the USA. Custom-built overseas. Imported for on-going supply. SA182 - 1 in stock