Check the listing for details. Plantronics S12 Corded Telephone Headset System ~ Complete Set. Color: Gray, Condition: Used. Listed at 21.99 USD. Enhance your communication experience with the Plantronics S12 Corded Telephone Headset System, offering ultimate comfort and convenience. This headset is perfect for those who prefer a single earpiece and wired technology for uninterrupted calls. Featuring a 7ft long detachable cable and a 2.5mm jack, this headset is compatible with most devices and provides a clear sound quality, thanks to its noise-canceling microphone. Moreover, the Plantronics S12 Corded Telephone Headset System comes in a sleek gray color and includes a range of features such as volume control, microphone mute button, and closed-back design for noise cancellation. With its open back and proprietary connectivity, this headset is perfect for people from different walks of life, including customer service representatives, telemarketers, and salespeople.