NVC90D-42S 420TVL, 0.5LUX, 1/3 SONY Super HAD CCD NVC90D-50S 520TVL, 0.5LUX, 1/3 SONY Super HAD CCD Auto Iris Control DC drive Video Compression H.264 Baseline Profile@Level 2.2 Video Frame Rate CCD PAL: 1-25frames/second NTSC:1-30frames/second Video Compression Bit rate 16Kbit/S~4Mbit/S Audio Input 1channel,linear input Audio Compression G.726 Audio Output 1channel,RCA interface,linear output Audio talk-back Built-in Mic Supported Protocols TCP, UDP, IP, HTTP, FTP, SMTP, DHCP, DNS,ARP, ICMP, POP3, NTP, IPsec, UPNP,RTP,RTCP System Interface 10M/100M self-adapting Ethernet port, 1 RS485 port,1 RS232 port (supports transparent protocols) SD card slot 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 6W