What It Is: 

Need more fans but out of spots? Don't want to cut those nice 3 or 4 pin Fan connectors?  This is the answer then, You can hook up to 7 fans on this board.  4 Fan Header style with 3 1x3 XH connectors.  But maybe you only have 4 fans and want to run RGB or Lights... well it can handle that as well.  Comes with RP2040 controller as well. 

These should be preflashed and ready to go, all that is needed is to find the serial id

More info can be found here:   Tiny Fan Board