4ch Standalone DVR, 120fps D1 real time, economical DVRs YS-6004V DVROS: Embedded LinuxVideo Input: 4CHVideo Output: 1CH BNC and 1CH HD ... Detect Regions per Image; 6 Sensitivity Levels3G Mobile OS: Works with Symbian, Windows Mobile, iPhone, Blackberry(RIM), Andriod(Google)Backup ... Mode: Network backup,USB backup,USB DVD-RW backupNetwork Functions: TCP/IP, UDP, DHCP, DNS, IP Filter, PPPOE, DDNS, FTP ...