Phony argument. An electronic thermometer and blood pressure monitor ensure safety too and they never need a license. Do x-ray machines need a license? This ulrasound device by definition doesn't even emit radiation. This company is conning its users.
Thermometers and blood pressure monitors are passive devices. Ultrasound systems do emit radiation, in the form of ultrasound vibrations from a transducer of some kind. In the ultrasound industry, there are two measurements, mechanical index (MI) and thermal index (TI) used to characterize the power being transmitted into human tissue. Clinical ultrasound manufacturers usually have a lab (AP&I "Acoustic Power and Intensity") to measure these parameters to stay within what are thought to be safe limits.
You can believe they are conning their users, but if you want to manufacturer and sell ultrasound systems, you generally have to comply with many different regulations.
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