Radio Jay was doing a review on another portable DSP radio, with so-so performance, but what caught my attention was the company name of the product he reviewed, Retekess. Well, I've never heard of them. A quick search of their product line show some interesting FM transmitters, (None of which are legal in the USA.), and this 2.4GHz audio TX / RX,
https://www.retekess.com/categories/Audio-Monitor-SystemA potential STL??? What I don't like is it's yet another appliance on 2.4GHz that may have a potential to mess with wi-fi. Still, intriguing.