Grandstream Networks GRP2601. Product type: IP Phone, Product colour: Black, Handset type: Wired handset. Lines quantity: 1 lines. Display: LCD, Display diagonal: 5.61 cm (2.21"). Ethernet LAN interface type: Fast Ethernet, Ethernet LAN data rates: 10,100 Mbit/s, Supported network protocols: SIP RFC3261, TCP/IP/UDP, RTP/RTCP, RTCP-XR, HTTP/HTTPS, ARP, ICMP, DNS(A record, SRV, NAPTR),.... Width: 180 mm, Depth: 208 mm, Height: 63.4 mm