It was surprising that they worked well enough for our cruise! They seemed to work 90% of the time. We had an issue from the very top of the ship and trying to contact family in the 2nd. deck infirmary location. They didn't work well, maybe due to the confined location and distance! We heard some clicking and garbled response but otherwise they were very good overall.
One was used by my five year old, had to just tell her to hold the button in when she talked, two year old dropped in toilet, smashed on ground LCD screen popped out, went right back in, and still working great. Did have to let dry after toilet incident.
In the users guide it does say that you can use it hands free. You activate iVOX. You can also purchase optional headset accessories. It comes with information on headset accessories and model numbers.