Milo operates in the open ISM sub-GHz and 2.4 GHz bands, which is why you don’t need a license to use a Milo. Milo uses sophisticated channel management to avoid interfering with other radio equipment, and it avoids other equipment interfering with your Milo conversations. It also means that separate groups of Milos can be close-by and not interfere with each other. In an environment where there are strong transmitters in the same bands, it’s possible that Milos would experience some interference.
It is of course your responsibility to be aware of and follow all local regulations as they apply to radio use.