Route audio from equipment with a compatible 3.5 mm headphone output to a black ThinkWrite Duro wired headphone. The analog connection gives the endpoint a direct physical path to the listener without requiring a network connection for the audio link. TW200 denotes this Duro headphone ordering configuration, pairing the named Duro designation with a 3.5 mm connection and black exterior. Use the headphone with workstations, laptops, tablets, media players, or other endpoints that expose a 3.5 mm headphone jack. A physical audio plug suits shared desks, classroom stations, testing areas, library listening positions, and supervised media use, where users connect directly to the endpoint. Verify that the host device has the required 3.5 mm audio output before assigning the headphone to a location. Select this configuration when the required details are the Duro headphone designation, black color, and wired 3.5 mm audio interface. The connector requirement matters at the endpoint: devices that provide audio only through USB, Bluetooth, or a proprietary connector may need separate audio hardware. Keeping the connection analog also makes the headphone choice easy to recognize during setup, storage, and reassignment across compatible locations. The black finish provides a consistent visual designation for deployed listening equipment.