Where can I obtain the hardware to run a wireless quiz competition?

Question

I would ideally like it to have a numeric keyboard which allows users to submit data to a central point where the information can be processed. On big screens the question appears, for example "What is the answer to xyz, a) blah b) blah c) blah etc
Users then hit "c" on the keyboard and it's transmitted to the receiver and I am able to configure what to do with the results.

Answer 1

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