Tempest2400 operates in 2400-2480 MHz (80MHz) of the spectrum often referred to as the 2.4GHz ISM band. Advanced digital wireless transmission technologies allow users the ability to operate up to 11 BaseStations and 55 full-duplex BeltStations in the same RF space at the same time with no license requirements and no frequency coordination. Tempest?s wireless system, while advanced and sophisticated, has been designed to be very easy to set up and use virtually anywhere worldwide.