A medical, in particular dental system with at least one first transmittingand/or receivingunit and at least one second transmitting and/or receiving unit, wherein theat least twotransmitting and/or receiving units are designed for the capacitive couplingof electricsignals into and/or out of a human body, so that an electric path whichextends throughthe human body of the user and/or of the person to be treated can beestablished for thetransmission of electric signals between the at least one first transmittingand/or receivingunit and the at least one second transmitting and/or receiving unit, in orderto transmitdata between the at least two transmitting and/or receiving units.