With the many different kinds of adapters out there, the
wireless adapters product area means the products that usually come in some kind of casing, not so much open cards that you can see all the micro-sized electronic parts usually on a green colored board. The adapters on the wireless adapters product pages, currently, are in the product description area of USB, LAN, a few other technologies.
As technology continues to progress, there of course stands a good chance that adapters will be increasingly multifunctional, the number of functions for the adapters will increase. Therefore, the product category, is left broad enough to add these up and coming products when they arrive on the market.