3 x GekkoScience COMPAC F with Fan Upgrade + Bitcoin Merch® 7-Port USB Hub - COMBO Up to 1.05+TH/s

So, if you buy these miners expecting to profit, don't. These are incredibly fun to play around with and lottery mine with. The fans are noisy so I wouldn't put them somewhere where you need silence but i don't mind the noise at my desk, personally. They work as intended. I don't have them overclocked and they still average close to 300 gh/s a piece. Setup was easy. Had them up and running in about 6 minutes total. Check them out if you want to play around with some usb miners but, again, don't expect a profit from these :)

Product is ok, price is probably too much considering also I had to pay 155€ of customs fee for something that's not for "production"
Fan are also a bit noisy.

These compac F miners work. The issue is POWER. Even the provided 7-port hub stuggles to power the miners (in overclock state).
The Compac F requires a hub WAY OUT OF SPEC. Hence nearly impossible to find one.
My personal experience with the Compact F is a max clock range: 450-490 MHz. Not sure why I get varying results, but its a power thing.
The listed overclock of 400 will not get you to ~334 GH/s needed for a total (3 device) 1 TH/s.

If anyone is aware of a USB hub with over 3.1 amps per port - LET ME KNOW.

It’s a perfect little desktop Bitcoin miner. Took it out of the box and haas it minning in 20 minutes. Love it!

I spent more time unpacking than making it work. The CompacF kit + the Raspberry CPU made the magic. I’m mining Bitcoin. The whole exercise was productive and as a learning experience was exceptional. The product came so well packaged and protected and the tracking was easy.