140mm Dual Ring RGB Fans x3 pcs: 21 / 6 independent RGB LEDs in every fan, split between two separate light loops, Rainbow and static colors. High thermal efficiency: high airflow and large volume cooling by blade design; Super silent: Equipped with rubber pads and rifle bearing, which provide silent operation. Easy to use: the fan hub allows you to control the fan speed and LED mode by remote control, or connect to the motherboard, control the fan speed by PWM and light by 5V 3pin ASUS Aura Sync, MSI Mystic Light Sync (J-Rainbow) and GIGABYTE RGB Fusion 2.0 (Please note: It does not support 12V 4 pin RGB header from motherboard). PWM fan control: allows for dynamic speed adjustment, minimizing noise or maximizing airflow. RF wireless control: allow you to adjust Fan Speed (S/M/H) and cycle through lighting effects / brightness / LED speed without opening the case.