MPEG-4 image compression ,wireless WIFI 802.11b/g .
ADPCM Audio compression, support Audio monitor, Connections are also available for an external microphone and for audio output
Built-in Web server,supply free client management software, 4/9/16 multi-pictures interface surveillance, free Multi-screen management software:

Date&time stamp, date&time also show in snapshot&record files name ,and Text overlay

Scheduled backup

Fast/Slow forward,replay and pause

Event-triggered, Scheduled and Manual recording

Instant search record files by channel No. time, record type

Hard disk quota warning

AVI/AV format export

Adjustable image size, quality and bit rate

Max. 30fps image compression
Max. 30fps image transmission
D1, CIF, FIELD, QCIF Resolution
Support DDNS, TCP/IP, ARP, RARP, ICMP, DHCP, FTP, HTTP, and SMTP protocol support

Self-contained FTP server & E-mail sending function