The Cisco CP-8811-K9 is a corded telephone designed for business use. As part of the Cisco brand, it offers reliable and high-quality communication features. The model CP-8811 is known for its durability and functionality, making it a great choice for businesses looking for a dependable IP PBX system. With its sleek design and advanced technology, the Cisco CP-8811-K9 is a top choice for those in need of a dependable VoIP business phone. I have four that are unopened and one that is opened. This sell is for 1 in total unopened .