DEUS complies with standards for user safety with regard to electromagnetic waves. The strength of the radio signals used is considerably weaker and on a much smaller scale than those emitted by mobile telephones (2,000 to 4,000 times weaker!), as well as being much less than those used by Wi-Fi systems.
Moreover, when the complete system is used, the audio headphones only act as a passive radio receiver, and do not emit any signals.