VIVOTEK IP7131 PoE Network Camera. Maximum resolution: 640 x 480 pixels, Video formats supported: MPEG-4. Sensor type: CMOS, Optical sensor size: 1/0.157 mm (1/4 "). Focal length range (f-f): 2 - 4 mm. Flash memory: 4 MB, Internal memory: 32 MB. Compliance industry standards: 802.3af, Supported network protocols: TCP/IP, HTTP, UPnP, RTSP/RTP/RTCP, IGMP, SMTP, FTP, Telnet, DHCP, NTP, DNS, DDNS