The 61 GHz ISM band, as defined by the International Telecommunication Union (ITU) Radio Regulations Industrial, Scientific and Medical (ISM) band, is a frequency band that falls within the millimetre-wave section of the electromagnetic spectrum. This band is designated for unlicensed use, meaning it can be utilised without a government-issued license within the range of 61.0 to 61.5 GHz. The 61 GHz band is particularly suitable for high-speed wireless communications such as point-to-point backhaul due to its large channels, which allows for faster data transmission rates. However, it also has a shorter range and is more susceptible to atmospheric absorption, particularly by oxygen molecules.