For product "thinkreality a3 smart glasses",Identify 6 components or subsystems for your product. Conduct an FMEA starting with those components or subsystems to identify the impact of their failure on the function of the product.

For each identified failure mode, suggest a level of maintenance (e.g.: User serviceable, local service center, factory) as well as a maintenance policy (e.g.: If the product is less than 3 years old, replace the component with a new one. Otherwise, replace the product.).