NVC81D-42S 420 TVL, 0.5LUX,1/3 SONY Super HAD CCD NVC81D-50S 520TVL, 0.5LUX,1/3 SONY Super HAD CCD Auto Iris Control N/A Lens Build-in 4-9mm high quality vari-focal lens inside Video Compression H.264 Baseline Profile@Level 2.2 Video Definition CCD PAL:352*288(CIF),704*288(2CIF),704*576(D1); NTSC:352*240(CIF),704*240(2CIF),704*480(D1) Video Frame Rate CCD PAL: 1-25frames/second NTSC:1-30frames/second Video Compression Bitrate 16Kbit/S～4Mbit/S Audio Input 1channel, linear input Audio Compression G.726 Audio Output 1channel,RCA interface, linear output Supported Protocols TCP, UDP, IP, HTTP, FTP, SMTP, DHCP, DNS,ARP, ICMP, POP3, NTP, IPsec, UPNP,RTP,RTCP System Interface RS232 port (convert to 10M/100M self-adapting Ethernet port, and power supply, Alarm port) Alarm Input 1 channel on/off input, supporting NO(normally open) or NC(normally close) sense. Alarm Output 1 channel on/off output,120VAC 1A/24VDC 1A Input Power Supply DC 12V,1A Maximum Power Less than 7W (IR on)