The biggest selling point for this rather neat looking, if slightly overweight, microphone radio system is that it operates on the lesser used 5.8GHz band. Although, mind you, once the 5G telephone networks are up and running, its relative immunity from interference might change.
Once the transmitter and receiver are paired it offers four spot frequencies and it remembers the selection when powered off. Changing from one spot frequency to another is achieved from the transmitter with a push of a button and the receiver automatically changes its spot frequency to match.
So, it is relatively simple to operate. Slightly annoying that it is so fat. Its bulge extends beyond the boundaries of an XLR mixer input, so you cannot put two of theses side by side. There will have to be a normal XLR connector in between.
The biggest failings, and ultimately THE most significant, are the audio quality and the signal-to-noise ratio.
Audio quality, whilst clear and bright, sounds heavily processed. Highs and High-mids appear to be boosted, leading to a rather unnatural sound. It has to be said though, that on its own this might not be too noticeable or distracting. It really only becomes obvious when compared side-by-side an XLR cable connection to the mixer.
BUT ... it produces a LOT of background 'hiss'. When I say a LOT, I mean...
A LOT!!
Given that it is less susceptible to both causing or suffering from radio interference with other wireless devices, unlike mic & instrument radios using the 2.4GHz band, I could almost live with its other foibles for such a low price, but the level of hideous noise puts it straight into the "return for a refund" category.