1. 4Ch HDD DVR with dual SD card for safe storing
2. Optional built-in 3G/WIFI
3. Unique design with an-vibration and heat dispersion
4. Video resolution D1/HD1/CIF optional
5. Support remote control and mouse (USB2.0, USB1.1)
6. Networking protocol: TCP/IP, FTP, SMTP, RTP, DHCP, and DDNS.
7. Support RS485 Tilt control
8. 4 triggers and Linux system
9. Warning: support 7CH high level alarm input, compatible 4CH dry contact alarm input
10. 4CH high level alarm output