Adafruit sells boards as subassemblies, which don't need individual certification. https://emcfastpass.com/fcc-rules-kits-subassemblies/ https://emcfastpass.co

Adafruit sells boards as subassemblies, which don't need individual certification. https://emcfastpass.com/fcc-rules-kits-subassemblies/ https://emcfastpass.com/fcc-rules-kits-subassemblies/ Putting that board into an enclosure and then selling it now makes you the manufacturer, and you must certify that new product.