Bests & Worsts Reviews from Amazon

This is a scam. It doesn't block 5G which is a name of wireless data standard. It is something mobile phones will use, not house routers. And it's not a Faraday cage which, if it was real, would block all signals and make your router unusable. This is a box. You're basically doing the same as placing your router in a cardboard box. Only since it's metal you are ruining wifi performance and get zero benefit from made up danger of 5G.