Image sensor: 1/4-inch CMOS CPU: HI3510 CPU, 64MB SDRAM, and 8MB flash Operating system: Linux Image sensor: CCD (Sony/Sharp) or line CMOS Supports auto DC lens Video compression: H.264 baseline profile at level 2.2 Video definition: CCD: D1 CMOS: VGA (640 x 480 pixels) Video parameters: brightness, hue, contrast, saturation and image quality and lens control (AI/EE, BLC, AGC and AWB) Stream format: pure video stream or composite streams of audio and video Video frame rate: PAL: 1 to 25 frames/second NTSC: 1 to 30 frames/second Video compression bit rate: 16Kbps and 4Mbps Video output: one-channel composite video output Linear audio input: one-channel linear input Input impedance: 1k ohms Audio input: built-in one microphone Audio compression: G.726 Audio output: one-channel linear output, built-in one-channel speaker and one buzzer Supported protocols: TCP, UDP, IP, HTTP, FTP, SMTP, DHCP, DNS, ARP, ICMP, POP3, NTP, Ipsec, UpnP, RTP, RTCP, and SIP Internet interface: 10Base-T/100Base-TX Ethernet port and Wi-Fi 802.11b/g wireless network Built-in P/T: Level: 320 degrees Vertical: 110 degrees SD storage: supports SD card local storage With Infrared: built-in infrared light Infrared range: 10 meters Wired port: one RS 485 port and one RS232 port, supports many P/T protocols and special device protocols Wireless remote controller: supports RF remote controller Wireless alarm ports: supports many kinds of RF alarm detectors and RF alarm protocols Wired alarm input: one-channel on/off, supports NO (normally open) or NC (normally closed) Wired alarm output: one-channel on/off, 120V AC, 1A/24V DC and 1A Power input: 12V DC, 1A Maximum power: less than 6W Working temperature: -10 to +55?C Storage temperature:-20 to +70?C Working humidity: 10 to 85?C Computer system requirements (OS): Microsoft Windows 98, ME, 2000, XP and 2003 IE: Microsoft Internet Explorer 5.x or above