Frequency: 1880 1900 MHz in Europe, 1900 1920 MHz in China, 1893 1906 MHz in Japan, 1910 1930 MHz in Latin America and 1920 1930 MHz in the US and Canada, US DECT and DECT 6.0 products may NOT be used in the UK or Ireland as they cause and suffer from interference with the UK and Ireland cellular networks with illegal use of such products being prohibited by UK agencies, and UK and Ireland DECT and DECT 6.0 products may NOT be used in the US and Canada as they cause and suffer from interference with US and Canada cellular networks and aircraft and for that reason is deemed illegal to use by US and Canadian agencies such as the Federal Communication Commission and Industry Canada.