61-61.5GHz is an ISM band, so it's unlicensed pretty much everwhere. This frequency range is heavily attenuated by oxygen, so it has inherently limited range an

61-61.5GHz is an ISM band, so it's unlicensed pretty much everwhere. This frequency range is heavily attenuated by oxygen, so it has inherently limited range and low risk of interference even at high emission levels.