Image sensor: LG all-in-one Minimum luminance: 1.0 lux (color), 0.2 lux (black, DSS) Focus: 16x optical zoom, 8x digital zoom BLC: super BLC Size: 5.9-inch alloy case Video compression: H.264 baseline profile at level 2.2 Video parameters: brightness, hue, contrast, saturation, and image quality Streaming format: optional video streaming or audio and video composite streaming Video output: one channel composite streaming Audio input: 1CH, linear input Input impedance: 1KΩ Audio output: 1CH, RCA interface, and linear output Audio talk-back: 1CH, mic input Supported protocols: TCP, UDP, IP, HTTP, FTP, SMTP, DHCP, DNS,ARP, ICMP, POP3, NTP, IPsec, UpnP, RTP, and RTCP Alarm input: 1CH on/off input, supports NO (normally open) or NC (normally close) sense Alarm output: 1CH on/off output, 120V AC 1A/24V DC 1A Operating system: Microsoft Windows 98/Me/2000/XP/2003 Browser: Microsoft Internet Explorer 5.x or above