Features: Experience precises control over your fan speed with our adjustable fan speed controller, designing to reduce noise and extend the lifespans of your cooling systems. This fashionable controller features a knob switch for easy operation, allowing you to adjust starting speed, ensuring compatibility with 3.5V-12V fans and optimizing your thermal management. For technology enthusiasts and diyers, this fan speed governor is perfects for customd pc builds, home servers, and electronic projects requiring effective heat dissipation. Enhances your workspaces or game setups by integrating this fan controller, providing a quieter environment and maintaining optimally temperatures for your devices. With its compacts designs and simple installation process, our fan speed controller delivers both functionality and convenience, making it essential accessory for maintaining your electronics in best condition. Specifications: Component:ABS Total Length:Approx.85cm/33.46inch Suitable for 3.5V-12V blowers and fans Support 2W-200W, 5.5x2.1mm output interfaces Package Includes: 1pcs Fan Speed Controller note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual colorings of the item. Thanks for your understandings.