I have used the free solo system all summer and think it is value for money, easy to use, it syncs or can be programmed on the transmitter and receiver, rack ears, carry case, XLR output, AA battery's .. Good strong signals out doors around 20 metres indoors no problems with distance .. Works like a Senn.... But you could buy 2 of these systems and a 2u rack for the same price as one.. "You can't go wrong"