Can I give NBE treatment if I am pregnant?

Working on a pregnant woman is contraindicated for a beauty treatment. 
It is not always said to be dangerous, but this maxim offers 100% safety to the beautician performing the treatment. 
If something does ever go wrong with a pregnancy, the beautician remains unaffected.

Now rightly your question, and what if you are pregnant yourself 
The device was tested by a separate lab.  Here, it checks whether the radiation output is within standards.  
Basically, every NBE 3000 is coaxially shielded and the radiation falls within the established standards. 
Its radiation power is smaller than that of a smartphone !

So we too are safe because the certificate shows that we are within the set standards. 
Consider also that all bluetooth states are also part of the electromagnetic spectrum.