It's easy to have 2 receivers in a 1U rack.
The frequency band is easy to change and on both the sender / receiver side.
It works on twin AA battery's which is easy and fast to swap, no worrying of charging battery's.
The antenna of the belt pack is not that roughly build, so be aware of easy to damage.
The range of the standard antenna's is surprisingly wide, if used in small studio setup or on location that you are within 20m of the receiver no additional antenna is needed.