... )x50(H)mmWeight installationTable model installation24 Channel DVR Expansion These 24 channel DVR units have been optimized so that you can ... . Also, you can always upgrade any of these PC based 24 channel DVRs to accommodate more space. Secondly, because PC-Based ... to record the surveillance video, you can upgrade from a 24 channel DVR to as many as 64 security cameras by ...