The EverFocus VANGUARD 4×2 is a hybrid DVR which supports 4 AHD/TVI/SD Analog cameras and the flexibility of an additional 2 IP cameras. Operating on a Linux-based system, these DVRs are able to install 2 SATA HDDs with up to 12TB storage capacity. An eSATA port is also provided for connecting to an external eSATA storage device. VANGUARD series DVRs support multi-channel playback at multiple speed options and easy data search by event, snapshot or sub-periods. Users may enable and perform the specified functions through the local On-Screen Display (OSD) menu or Web interface. Furthermore, you can use the VANGUARD mobile app to remotely view camera streams from the DVR through your handheld devices; or use VANGUARD CMS video management system for remote management.