Purchased this product to use as a dedicated surveillance system.I added a cheap video card to gain a HDMI port and also added a dedicated surveillance drive for my footage.System was packaged nice and I would never have guessed it was “refurbished”The system is working flawlessly for me so far and I am very happy with it for my use.For those purchasing for similar purpose as mine, I am running 11 cameras (4k(1) and 5mp(10) and recording 24/7 with a CPU usage between 20-35% on Blue Iris software.