For the looks or the design, it looks like a desktop CPU similar to Avalon Q, but comparing them, it seems this one is more efficient than the Avalon Q.
The only problem is the manufacturer of Fluminer is not well-known. I check their website, and it seems they don't release their own firmware publicly. Unlike Avalon Canaan, which is a well-known company, their firmware and manuals are publicly available on their site.
If you have almost free or totally free electricity, then I suggest staying with Avalon Q rather than buying FluMiner T3.
If you have free electricity, you can buy an old S19 ASIC and upgrade it with a controller or firmware to mine on one board instead of three.
There are a lot of components and spare parts for this ASIC, as well as many different firmware options for energy efficiency.
But the best thing about this option is the price of 200-300 dollars.