Plantronics S12 Corded Telephone Headset System (Certified Refurbished) This Certified Refurbished product is tested and certified by the manufacturer or by a third-party refurbisher to look & work like new, with limited to no signs of wear. The refurbishing process includes functionality testing, inspection, reconditioning and repackaging. The product ships with all relevant accessories, a minimum 90-day warranty & may arrive in a generic white or brown box.Only select sellers who maintain a high performance bar may offer Certified Refurbished products on Amazon. 2-in-1 convertible headset for over-the-head stability or over-the-ear convenience Noise-canceling microphone for clarity, In-use indicator light lets others know phone is in use. Hands-free convenience & comfort Over-the-head and over-the-ear configurations, Noise-canceling microphone, call clarity technology