Actually I have just bought this:-
to extend the coax to my DAB tuner in its new position; at that price "cheaper" than me buying cable and connectors and bodging the assembly.
However before connecting to the DAB it inserted it on the feed from the VM splitter to the Hub 3. TTB tester still gave 101bps on my wired pc and 55bps on my wifi phone i.e. no difference.
So maybe it is what is says it is. Will buy the 5m.