DESC: Product Features: Type: ; Networking Connectivity: 1 x USB; VoIP Signaling Protocol: H.264, SIP; Protocol: ARP, DHCP, DNS, HTTP, ICMP, PPPoE, RTCP, RTP, SNTP, TCP, TFTP, TLS, Telnet, UDP; Codec: G.711, G.722; Supplementary Service: Call Hold (H.450.4), Call Transfer (H.450.2); Camera Type: CMOS; Video Frame Rate: 30 Frames Per Second; Buttons: Conference, Hold; Display Type: Color LCD; Display Size: 4.3 in.; Power Source: Via USB; Additional Features: Hand Free Mode, Phone Book, Speaker, Web Browser