Line and Account Support: Supports 2 lines and up to 4 SIP accounts.Connectivity: Integrated dual-band Wi-Fi (802.11 a/b/g/n/ac) alongside dual 10/100 Mbps Ethernet ports.Audio Quality: Full-duplex speakerphone with HD audio and Noise Shield Technology to reduce background sound.Conferencing: Supports 5-way audio conferencing.Management: Fully compatible with the Grandstream Device Management System (GDMS) for cloud provisioning and configuration.Security: Enterprise-level protection with secure boot, dual firmware images, and encrypted data storage.Headset Integration: RJ9 jack with Electronic Hook Switch (EHS) support for Plantronics