GRP26166-Line Professional IP Phone Designed for Mass Deployment and Easy ManagementThe GRP2616 features 48 virutal multi-purpose keys (VPKs), integrated Wi-Fi, Bluetooth support, a 4.3 inch color LCD with swappable face plates for easy logo customization, additional 2.4 inch display screen, and is supported by Grandstreams Device Management System (GDMS). FEATURES HD audio, handset and speakerphone with support for wide-band audio 10 line keys with up to 5 SIP accounts 40 built-in digital BLF keys; available extension module offers 40 BLF/speed dial keys per module Enterprise-level protection including secure boot, dual firmware images, and encrypted data storage integrated dual-band Wi-Fi 802.11 a/b/g/n/ac ( 2.4G hz & 5Ghz) Dual switched auto-sensing 10/100/1000 Mbps Gigabit Ethernet ports with integrated PoE Swappable face plates to allow for easy logo customization Integrated Bluetooth