What do a Silicon Valley massage spa, a local community college, and a Californian plastics manufacturer have in common? They will soon be testing hundreds of cutting-edge wireless devices, according to an application for an experimental permit filed last week with the U.S. Federal Communications Commission (FCC).

If that sounds unlikely, it is. It seems much more likely that the new devices will actually be tested at three nearby Amazon facilities. These include two buildings belonging to the company’s secretive Lab126 research division, and one of the retailer’s largest fulfillment centers in the state.