1 has a few LEDs which get stuck on 1 colour.
Controller/Hub is not available.
Each fan as 4pin pwm and 3 pin ARGB connector.
All 4 work very well as fans.
Purchased in 2019, 2 of them were replaced in 2020 because of LED issues.
Already received but no time to test and system also died!
Fans working fine. Issues with rgb software and compatibility though nothing to do with the actual fans!