The HP 4120 IP Phone Series is optimized for use with Microsoft Lync Unified Communications, and can support Office 365, Microsoft's familiar Office desktop suite combined with the latest, cloud-based versions of Microsoft's next-generation communications and collaboration services. All Lync-optimized IP phone features are supported by the HP 4120 IP Phone Series, including Microsoft's Better Together" mode, which leverages Lync's powerful collaboration capabilities."IP Phone Technology: VoIPConnectivity Technology: CableSpeakerphone: YesDisplay Color: ColorNetwork (RJ-45): YesNumber of Network (RJ-45) Ports: 2PoE (RJ-45) Port: YesCommunication Protocols: LLDP-MEDCommunication Protocols: LLDPHeight: 9.4Width: 8.9"Depth: 1.6"Weight (Approximate): 3.31 lb"