This category consists strictly of digital video recorders (DVRs). We offer 4, 8, and 16 camera DVRs. Cameras are never included unless specifically stated. A DVR allows viewing, recording, and playback from a hard drive. A digital video recorder can be a Windows based full blown Windows XP-Pro computer running surveillance software. It can also be an embedded DVR with the software on the motherboard, its only purpose is surveillance. Either way the footage is stored on a hard drive. DVRs can record continuously or on motion detection. Most of them can view live through the Internet if you have DSL or a high speed broadband connection.