I put it in my case, hooked up all of my fans, and it does its job.
My intended use was to have all the fans working at the same speed as my CPU fan.
I would highly recommend this if your in need of adding more fans to your computer but don't have enough system fan plugs on your motherboard.
As it is, since the fan header on my z370-e motherboard is near the top, I have to stick this hub on my power supply shroud to connect to the 3 140mm fans in the front of my case.
If your mobo does not have enough fan headers or if your like me I used this to connect all 4 fans for my push/pull config on my H100i pro AIO and plugged it into the cpu fan header.
Works fine, but the quality control is crap.
It's ok, doesn't stay on the wall and kept falling.
They work as they should but the adhesive is not very good.
I found that the ModMyToys fan hub is much better quality, can be used more than once and they are only $4.50 from Performance PCs.
I plugged it in and it shot a spark straight into my eye as well as killed my fan port, I can no longer use my fan in my case and I dont know what to do, this product harms computers DO NOT BUY!!!