The Assure band to base communications use the following frequency bands.
The Social Alarms section of the 869 MHz ISM band.
The Bluetooth Low Energy section of the 2.4 GHz ISM band.
Your Assure conforms to the standards set by the
European Telecommunications Standards Institute (ETSI) short range radios used for social alarms.
The power transmitted is less than 1/100th that of a typical mobile phone.