Lines and Accounts: Supports 2 line keys and up to 4 SIP accounts.Audio Quality: Equipped with a full-duplex speakerphone, HD audio on both handset and speaker, and noise shield technology to reduce background sounds.Conferencing: Supports 5-way audio conferencing for easy group calls.Power over Ethernet (PoE): Built-in PoE to power the device over an Ethernet cable (power adapter is sold separately).Headset Support: Electronic Hook Switch (EHS) built-in for compatible Plantronics, Jabra, and Sennheiser headsets.Management: Compatible with the Grandstream Networks Device Management System (GDMS) for centralized cloud provisioning and monitoring.Security: Enterprise-level protection with secure boot, dual firmware images, and encrypted data storage.Customization: Includes a swappable faceplate for easy company logo branding.