Professional 4 Channel (500GB Hard Drive Installed) HDMI H.264 Standalone Network DVR for Security Camera CCTV System – iPhone, Andriod Viewing. HDMI & VGA. Windows Graphical Interface; Embedded Real-time Linux 2.6 Operation System. Preview, Record, Playback, Backup, Network Surveillance. USB 2.0 Backup, PTZ Control

Professional 4 Channel (500GB Hard Drive Installed) HDMI H.264 Standalone Network DVR for Security Camera CCTV System - iPhone, Andriod Viewing. HDMI & VGA. Windows Graphical Interface; Embedded Real-time Linux 2.6 Operation System. Preview, Record, Playback, Backup, Network Surveillance. USB 2.0 Backup, PTZ Control: Camera & Photo Read more »