PSR and FMCW operate in the "multimedia band" of 24 GHz. The 24 GHz band is an unlicensed band which can be freely used in most countries around the world without conflicting with protected bands (like the ones exclusively reserved for police or military). The band can be used for point-to-point microwave communication and is used e.g., for Ethernet bridges or motion detectors.
Still some parameters are restricted by a certain maximum value like the operating power. The SkyRadar products operate in the milliwatt-range and emit less power than a typical mobile phone, however in a safer frequency range. Whereas mobile phones (1850-1990 MHz and 824-894 MHz) penetrate the human body, higher bandwidths ( > 6 GHz) are blocked on the surface of the human skin by the skin's humidity. The penetration is in the μm area and does not represent any proven danger to the human body.
The components conform with the requirements, specified in the Radio Equipment Directive 2014/53/EU (RED) of the European Parliament and of the Council of 16 April 2014. This directive sets essential requirements for safety and health, electromagnetic compatibility, and the efficient use of the radio spectrum (Article 3).
In addition the products conform to the standard for safety and health EN 62311 (2008) and electromagnetic compatibility EN 62368-1 (2014, AC:2015).