REVO America multi-port Power over Ethernet enabled Gigabit switch is a great addition to your REVO HD DVR. This device connects directly to the HD DVR and will allow you to connect and power 8 additional REVO HD cameras. Also it will allow for better control and communication between the recorder and the switch. For example, the REVO HD DVR can auto detect which ports the REVO HD cameras are connected to. In addition to that, the REVO HD DVR can cycle the power of the REVO HD camera even though it"s connected to the switch. This means the DVR can control the PoE power of each port. This Device also offers automatic network Configuration and individual port data transmission to the REVO HD NVR. Finally, the REVO HD switch supports high end network security so you can have the peace of mind that your video surveillance devices are secure from outside access.