I have an RBK50 kit with an RBR50 router and RBS50 satellites of the same size and it's a pretty close match. It's made of decent metal considering the Orbi's weight. Installation β standard homemade. They provide drywall screws and anchors, but I only needed one wood screw in the rack - your mileage may vary. The mounting plate is 2 1/2" tall and just under 6" wide with 1/2" mounting holes on the sides. The bottom has openings for ventilation and for inserting 4 ethernet cables and a power cord. Enough room to mount the Pressing power and sync buttons For what it is I think it's about $5 more than it should be But it's a simple first world solution.
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