Phanteks SK PWM DRGB fan Boasting nine blades and operating at 500 ~1500 RPM, this fan produces voluminous airflow to efficiently remove heat from the components and system. Its PWM capability delivers precise speed control to hit a perfect balance between cooling performance and noise level. The anti-vibration rubber padding allows stable operation, and the unique rigid frame enables excellent structure strength. With built-in D-RGB LEDs, this fan adds gorgeous lighting to your rig. In addition to a 4-pin PWM fan connector, each fan features a 3-pin D-RGB cable that supports daisy-chain, so you can connect multiple D-RGB fans or other peripherals together to a Phanteks D-RGB case, controller or a compatible motherboard. Available in 120mm and 140mm. The SK fans are high airflow focused fans, thanks to their 9-bladed design. Perfectly suited to be used as case fans. With PWM (Pulse-Width Modulation) capabilities built in, the SK fan offers precise model : Phanteks SK 140mm PWM Fan tag : Case Fans