The Bluetooth Low Energy radio receiver in your Sensate emits much less energy than your mobile phone. Sensate has been tested against the CE directive and conforms to safe standards. Bluetooth Low Energy uses a very small part of the spectrum at an extremely low energy to transmit its signals. It only transmits for a fraction of the time it is actually turned on (i.e. there is no constant signal) and your Sensate has been designed to keep EMF transmissions to a minimum. Sensate is not ‘streaming’ any data.