"A converted motel in a small town on the Mississippi River seems an unlikely home for a world-changing technology - what a flyer in the mostly deserted lobby calls a "new wave of scientific healing".
But since last summer, this building in East Dubuque, Illinois - three hours west of Chicago - has been outfitted with medical devices that supposedly imbue patients with "life force energy". It's one of a number of locations run by Tesla BioHealing - no relation to the car company - dotted around the US.
I tried out a medbed on a recent gloomy weekday afternoon. After being greeted at the front desk, a doctor tested my energy levels by having me place my fingers inside a metal box.
Then I was ushered into one of the rooms, mostly unchanged from its motel days, and I waited for "pure biophoton life-force energy" to stream into my body."
"The idea of medbeds - short either for "medical beds" or "meditation beds" - has become increasingly popular on fringe medical channels, on mainstream social networks and chat apps.
But people have very different ideas about what they actually are. Some insist that the technology is secret, unlikely to be encountered by mere mortals, hidden from the public by billionaires and the "deep state". The more conspiratorial theorising includes speculation about "alien technology" and bizarre claims like the idea that John F Kennedy is still alive, strapped to a medbed."
"A separate, more earthly avenue of thought holds that medbeds are very real and publicly available, just not part of the medical mainstream.
It's this strand that Tesla BioHealing and a range of other companies are staking their rather expensive claims on. Tesla BioHealing offers home generators for prices up to $19,999 (£16,500), although an hour in one of their medbed motel rooms will only set you back $160 (£130).
But even in the consumer-focused medbed world, where there is no talk of aliens or JFK, there's disagreement about what a medbed actually is. And there's a very good reason for that, says Sara Aniano, a disinformation analyst at the Anti Defamation League's Centre on Extremism.
"It's really hard to define something that doesn't exist," she says.
Ms Aniano has been researching the spread of medbed chat online, and as part of her inquiries signed up for trial with a different medbed company, 90.10.
"The trial is nothing," she says. "It tells you to lay on your bed and think really hard about the medbed."
"In their defence, they do list on their website in the very fine print down at the bottom that the medbed is not meant to treat or diagnose illnesses," she says.
It's a common disclaimer that we saw used in some form by just about every company offering a medbed-related product. Even though companies put out long lists of ailments that can supposedly be helped by their technologies, and provide testimonials from satisfied customers, they say that their products are not meant to replace treatments by a qualified doctor."
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