And that brings up this question. Why would they use such an obvious wire? There are wires easily available that would be invisible. It doesn't make sense.
There is a square box attached to the wire at her waistline also!!!! If the Mocs were on the podium WHY and what is this!!!
Two technical reasons, maybe three. Reception range; ability to "scramble" the signal; and battery life. The miniature units have a definite range limitation.