At a minimum you need a NDA and a patent attorney.
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I agree with Mr. Doland. If this device is as revolutionary as you suggest, it is worth a great deal of money, and the only way to protect it against piracy is to properly capture the intellectual property of the device by way of patents, and only share any of the proprietary information with those who are strictly limited by confidentiality agreements.
Good luck to you.
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I agree with Mr. Doland and Mr. Pederson. If you want to preserve your intellectual property rights to your invention, you must be very careful about protecting them. This means not discussing the product with anyone without a strong and binding NDA. As the other attorneys have mentioned, you should also consult with a patent attorney to determine if and to what extent your device is patentable.
Best of luck to you with the invention.
The information presented here is general in nature and is not intended, and should not be construed, as legal advice for a particular case. This posting does not create any attorney-client relationship with the author, and Pham Law Group does not represent you as your attorneys until retained by a written retainer agreement signed by both parties.