All these DVRs are about the same, may not work with higher quality cameras, but 2 megapixel is good, weak point is the power supply, best buy one Replacement part or an upgrade it has already had 2 failures on 2 different systems not of that brand although this system seems to be better than most it has 8TB max hard drive enough for months of recording with 16 cameras all around the clock, the hard drive is easy to install, you can do it yourself, about 6 screws and the cover is removable, four screws to fix the hard drive to the case and two straps
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