Specification ListYealink HD Voice with HD handset and speaker.2.4 320240-pixel color display with backlight.Dual-port Gigabit Ethernet with PoE support.Up to 4 SIP accounts and local 5-way audio conferencing.12 memory keys (4 pages of 3 keys each).Wideband and narrowband codec support: G.722, Opus, G.711, G.729, G.726, iLBC, G.723.1.EHS wireless headset compatibility via RJ-9 port.Adjustable stand with 2 angles and wall-mountable design.Unified firmware compatible with YDMP/YMCS.Linux-based operating system for reliable performance.A versatile, high-quality communication solution for professional environments.