For ultra mobile situations where you must use two receivers, the RK2 is the answer.  Uses standard output cables, powers from 4 pin Hi-RoseT connector so you can power it from the same battery source as your portable mixer or from your recorder or any suitable powering source.  Filtered, custom tuned RF distribution amplifiers are built in.

The RK2 is custom machined from solid aluminium, sheet aluminium and DelrinT parts, for strength and low weight.  In the hand it has the solid quality feel you expect from all your Audios.  As with the Rk4, the receivers are instantly removable for when you need to use one at a time.  The RK2 has a built-in regulator and is reverse power protected.