This unit is 'plug & play' compatible with ALL of our cameras and wireless receivers. Also compatible with most consumer television sets (those with standard composite RCA / BNC video inputs). Top quality 7200RPM HDD with 8MB buffer included INSTALLED (250 GB) + expandable to additional storage/ drives by request. Profile: What a great digital video recorder! More features with MUCH higher quality + speed in comparison to similar looking DVRS, many of which are terribly slow on playback with poo