By researching credible resources, find similar products/ideas to 'Modern Touchless Technology' to make an analogy. Using the research results, apply the A.T.A.R model to your product to get a rough estimate of the potential market size.

 

The A.T.A.R Model
Dimensions (A.T.A.R.)	Percentage	Results
(For each dimension (of ATAR), provide detailed information; what is the base of your data, where did you gather this information, what are the assumptions you made, what is the rationality behind etc..) You could use additional rows to include detailed information.