Design for Manufacturability (DFM) will determine if they generate a viable product. Hardware is difficult, with a success rate around 1:66 for a startup.

It is a good idea to consult with a contract manufacturer engineering team early, and stop wasting peoples time including their own.

I have also seen people re-brand China pad-printed generic products, and claim they needed investor help buying a shipping container full of cheap stuff or outright e-waste. Careful, especially if you see multiple versions or the same product pop up at the same time. Best of luck =3