Small wireless keyboard with built-in touchpad for $10

My daughter and I are building a portable device to play the 1981 RPG computer game, Wizardry: Proving Grounds of the Mad Overlord. We're running it on a Raspberry Pi using a a DOS operating system emulator called DOSBox. Here's what we've got so far:

Next, we have to design a case using TinkerCad, and then print it out on our Prusa 3D printer.

I've been looking for a small wireless keyboard and it looks like the one shown in the above photo will fit the bill. It's on sale on Amazon for $10 if you use the promo code BQZZXVBB. It also has a trackpad, which is not needed for Wizardry but will come in handy when using the Raspberry Pi's GUI.

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