D-Link has lately become known for their high end routers that look like they could be from another world, but they have also been making solid entry level performers and everything in between. Surprisingly one thing they haven't done up to now was a mesh network. Today we take a look at the COVR-3902 AC3900 Wi-Fi system. This unit consists of an AC2600 router and an AC1300 Wi-Fi range extender that promises a combined 6000 square feet of coverage.