Features: Experience unparalleled control over your cooling needs with our Manual 4 Wire PWM Fan Speed Controller, featuring a convenient switch for on the fly adjustments. Designed with a four wire PWM interface, this fan speed controller supports various fan types and ensures precise speed regulation to minimize noise and power consumption. Suitable for computer enthusiasts and server maintenance professionals who demand accurate fan speed control for optimal performances. Suitable for use in computer cases, server racks, and water cooling systems, our fan speed controller provide a stable thermal environment Enhance your Systems's longevity and efficiency with this user friendly, high quality fan speed controller, crafted from circuit boards, aluminum, and plastic for cooling solution. Specifications: Component:ABS Length:Approx.10cm/3.94inch Package Includes: 1Pc PWM Fan Speed Controller note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.