DECT uses a frequency band that is reserved for voice transmissions, called Unlicensed Personal Communications Services. In Europe, Asia, Australia, New Zealand and South America, the frequency band from 1880 MHz to 1900 MMHz is used. In the United States, the band is 1920-1930 MHz.To be sold in the US, only small changes need to be made to DECT equipment. These channels are reserved exclusively for voice communication applications and therefore are less likely to experience interference from other wireless devices such as baby monitors and wireless networks.