RGB System Hub, 4 pin RGB, connects via 9 pin USB headerl The Cooler Master MasterAccessories RGB Fan Controller is a sleek and compact device designed to control the RGB lighting on your computer case fans. With a voltage of 12V and dimensions of 14mm in height, 53mm in length, and 90mm in width, it is compatible with a variety of fans. The black colour adds a stylish touch to your setup, making it a must-have accessory for any computer enthusiast looking to customize their cooling system with RGB lighting.
It is second one I have bought.
In first build mobo did not had the RGB header, so had to buy this controller to control RGB fans.
For a second build I bought mobo with RGB header but as it have only one header, you can set only one colour for all bits. So bught another controller to set different mode for various bits.
Pros. It is magnetic so just stick it in the case where ever you like. It is tiny, so you can hide it if you like.
Cons. Because the controller is so tiny, connector pins are very small and feel fragile. It is ok if you dont have to plug them in and out every now and then.
All in all good product and not overpriced.