Dual RGB Lighting Loop: 16 Independent RGB LEDs in every fan, split between two separate light loops, allow for nearly endless customization. Expansion Kit: This product is intended as an expansion of the LL140 RGB LED 2 fan kit with Lighting Node PRO. The RGB functionality of this product requires a RGB Lighting hub and Lighting Node PRO. Complete PWM Control: Dynamically control fan speed from 600 RPM to 1,300 RPM to minimize noise or maximize airflow. Created for Quiet: 140mm Fan blade engineered for low-noise operation without sacrificing performance.