What cryptocurrency do you try to mine? It supports only scrypt-based altcoins.

https://shop.bitmain.com/promote/antrouter_r1_ltc_wireless_router_and_asic_litecoin_miner/overview

Once a year might be optimistic, depending on the coin, but they're cool little devices. You could mine low-diff alts (or indeed solo mine alts) with one if you wanted - better than a gridseed, and looks just like a normal router. Not a get-rich quick scheme, but faff-free! (Have a spare for sale if you want to PM).