The Yealink SIP-T31P HD Voice 2-Line Corded IP Phone in black offers high-quality HD voice and 2 phone lines for business communication. With a sleek design, this corded telephone connects via Ethernet (RJ-45) and DC power (NOT INCLUDED), making it suitable for enterprise networking and IP PBX systems. Released in 2019 by Yealink, this model is a reliable choice for businesses looking for a secure and efficient communication solution.