These – devices, sometimes also referred to as factory guidance systems or whispering cases, all consist technically of a microphone/transmitting part on the one hand and one or more receiving elements on the other. These parts are connected via radio. Participants can choose between headphones, single-earphones or stethoscope earphones, depending on the application. A so-called induction loop is used to transmit directly to a hearing aid if a participant has hearing restrictions (keyword barrier-free).

Guide systems are used at conferences, congresses or court hearings with simultaneous or whispered interpreters as well as for guided city tours, museum tours or plant tours/group tours through noisy production halls. Of course, they do not replace an interpreting system with a soundproof booth as used at all-day conferences and are therefore rather ideal for mobile / movable use as described.