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 20meter 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.