I bought this mini kiosk for the weather in my kitchen. Great for that - can't comment on speakers or touchscreen. You can power the Pi via USB or the 40-pin connector - the kit includes the correct connectors for both. I managed to save a Pi4 from the trash because I broke its USB connector - I put it here and powered it from the 40 pin connector. If you have a 3D printer, there is a stand for it on thingiverse. What goes with it are just legs, nothing more.
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