Mpeg-4 image compression Adpcm audio compression Built-in web server, ie client support Max. 30fps image compression Max. 30fps image transmission D1, CIF, field, QCIF resolution Support DDNS Support motion detection and watermark Support watchdog 30~50 meter radiation distance Support CCD scan mode TCP/IP, ARP, RARP, ICMP, DHCP, FTP, HTTP, and SMTP protocol support Remote snap shot and video recording Self-contained FTP server & e-mail sending function Free multi-screen management software. Applicable indoor-outdoor installation Applicable in schools, banks, communications, posts and telecommunications, electric power system, video conference, high-class hotels, multinational enterprises, chain stores, home security etc.