There are a few reasons you may need to use the handsets in this way:

• A presenter wants to use an Interspace Industries handset in a remote location instead of the GlobalCue use of a mobile device directly (touch screen).
• This could be another room with no XLR cabling infrastructure and an RF handset is impossible (solid church walls etc...).
• Or an external site elsewhere on the planet.

Please find a full tutorial here: Remote Physical Handsets Presentation