Questions about UNI FAN SL-INF 120

With Lian-Li's L-Connect 3 software, provided the fans are correctly connected to the controller and the latter is at least connected to the two power connectors and the USB header on the mainboard.
https://lian-li.com/de/L-Connect3/

The item Lian-Li UNI FAN SL-INF 120 ARGB PWM, 3-pack incl. controller (120 mm) is currently marked as sold out. It could be that some of our suppliers will receive further quantities at the end of December. However, this is very uncertain from today's point of view.

What do you mean?

The controller is included in the 3 pack, on my build I'm controlling 10 fans with it :)

You can screw the fan onto the radiator and then connect the fans to the controller included in the 3-pack. You can then control the fans separately from the AIO via the Lian-Li software or you can connect the controller to the mainboard if you want to control the fans via the mainboard.

Yes

Hello, simply the direction in which you are going to put it. Turn it on the palm of your hand and you'll feel which way the air is going.

I currently have 4 Lian Li controllers in the system at the same time.

Therefore you can use more than one, often an internal USB splitter such as [Akasa Internal USB 2.0 Hub Card (30 cm)
Akasa Internal USB 2.0 Hub Card (30 cm)
Shouldn't be a problem with 2 unless you have another internal USB port that you want to use...

However, mine does not recognise the fans and controllers correctly for the update (probably due to the 4 controllers), so I recommend doing this manually.
You can find all the information here:
https://lian-li.com/l-connect3/l3_update_manually/