Check the listing for details. Plantronics S12 Corded Telephone Headset Hands Free System Tested Working EUC. Color: Gray, Condition: Used, Made in China. Listed at 24.95 USD. The Plantronics S12 Corded Telephone Headset is a single-earpiece headset system that offers hands-free convenience for phone calls. With features like a microphone mute button, volume control, and noise cancellation technology, this headset provides clear communication while minimizing background distractions. The gray color and sleek design make it a stylish accessory for any workspace. The 7ft detachable cable ensures flexibility in positioning, and the 2.5mm jack and proprietary connectivity options ensure compatibility with a variety of telephone systems. Whether for home or office use, the Plantronics S12 headset offers reliable performance and a comfortable wearing experience.