This Invention is used to scan food and tell you what is inside the food to make sure you are only eating the healthiest ingredients.

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There is a deeper explanation on this website: http://tellspec.com/howitworks/

This video shows how it works:

This relates to engineering because it uses electrical engineering to scan the molecules. It also relates to engineering by the fact that you wouldn’t find this in the wilderness or most of the things that make it up.