I bought this unit to replace an 8 channel model from the same manufacturer. It was very easy to disconnect the cameras from the old system and connect them to the new one. My videos are clearer than before. Installing a new hard drive was very easy. Annke tech support was always helpful, I emailed them asking how to add IP cameras. Answered 24 hours with step-by-step instructions with screenshots and a link where I can find recommended IP cameras on Revain.
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