The Toshiba Surveillix DVR Series sets the standard in user friendly, high definition recording. With available Internal RAID 5 HDD capabilities and field-replaceable hard disk drives, the DVR Series is designed for maximum reliability. The DVR Series can be configured to allow HDD storage expansion in the field without it needing to be returned to Toshiba for upgrading. Each system includes a built-in RS-422 adapter supporting over 45 protocols as well as a CD-RW with available DVD Multi Burner.