Operation system:Embedded Linux OS System security:Supports three-level account, password, user multi-level authority management DDNS:Provide DDNS for free ,like demo.gocam.so Image sensor:1/4 inch 3.0MegaPixel Color CMOS Image Sensor Collection SNR:≥45dB Minimum Illumination:0.3Lux Collection 3A:Auto White Balance,Auto Exposure,Automatic Gain Collection Lens:Standard：6mm Compression Format:Motion-JPEG Resolution of Main Stream:VGA（640×480）/QVGA(320×240) Maximum frame rate:25fps Bit Rate:32Kbps～4Mbps Adjustment:light intensity,contrast ratio,saturation level are adjustable. Nightvision Effects:24 Φ 5 IR leds , IR Distance: 20m Audio Encode formats:ADPCM Audio Input:one channel linear input /Microphone Input,normal connector Of 3.5mm Audio Output:one channel linear output,normal connector Of 3.5mm Network Socket:RJ-45 10/100Mb self-adaptable Ethernet slot Network Protocol:TCP/IP，HTTP，TCP，ICMP，UDP，ARP, IGMP，SMTP，FTP，DHCP，DNS，DDNS，NTP，UPnP，RTSP，PPPoE ,etc