Overview | Designed for the new way you workThis desk phone makes work easy. Built for hot-desking or the home office, these phones offer the perfect user experience. Two displays and 12-line keys give you more ways to connect, plus quality audio, in a seriously sharp package.Built to growThis workhorse phone is outfitted with a big 5-inch color display and is designed to handle up to 48 lines. What's more, the Poly Edge E500 Series can take on two additional expansion modules, supporting up to 66 more contacts each. Manufacturer: HP Inc. Manufacturer Part Number: 89B57AAABA. Brand Name: Poly. Product Line: Edge. Product Series: E. Product Model: E550. Product Name: Edge E550 IP Phone and PoE-enabled with Power Supply. Product Type: IP Phone. [Technical Information] Handset Connectivity Technology: Corded. Base Unit Connectivity Technology: Corded. IP Phone Technology: VoIP. Wireless Technology: NFC. Wi-Fi. Bluetooth. Wireless LAN Standard: IEEE 802.11a/b/g/n. Speakerphone: Yes. [Interfaces/Ports] Network (RJ-45): Yes. Number of Network (RJ-45) Ports: 2. USB: Yes. PoE (RJ-45) Port: Yes. [Physical Characteristics] Form Factor: Desktop. [Miscellaneous] Energy Star: Yes. Country of Origin: China. Environmentally Friendly: Yes. Environmental Compliance: China Restriction of Hazardous Substances 2 (China RoHS 2). [Warranty] Limited Warranty: 1 Year.