Compression:Waterproof IP IR Camera Sensor:1/3 SONY CCD ... direction Support variety of internet protocols:HTTP, TCP/IP,UDP,SMTP, DDNS, DNS,SNTP,DHCP,FTP, ... Channel two-way audio Exceptionally self-recovery function, network automatic connection function when internet interrupt Applicable fields: ... Sensor·1/3-inch CMOS/ CCD optionalSupport ProtocolTCP, UDP, IP, HTTP, FTP, SMTP, DHCP, DNS,ARP, ICMP, ...