... resistant2. 27X optical zoom3. With a heater & fan inside, applies to frozen & hot weather4. H.264 video compression, G.726 audio ... compression5. Uses high quality step motor and professional drive circuit to ensure the long working life, high stability and the smooth ... & recording, maximum pixel 704X576(PAL)/704X480(NTSC)9. Supports HTTP, TCP/IP, ICMP, RTSP, RTP, UDP, RTCP, SMTP, FTP, DHCP, DNS, DDNS ...