All these DVRs are about the same, may not work with higher quality cameras, but 2 megapixels ok, the weak point is the power supply, best get one spare or upgrade, already had 2 failures on 2 different systems, not of this brand, although this system seems to be better than most, it can with max 8TB hard drive enough for months of recording with 16 cameras 24/7, the hard drive is easy to install , You can do it yourself, about 6 screws and the cover is removable, four screws to attach the hard drive to the case and two straps
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