Features: Elevates your device's performances with our 12v pwm speed controller, featuring 5.5x2.1mm interfaces for seamless compatibility with a wide ranges of equipment. This speed controller is engineered with precisions to offer smooth, step less speed regulation, ensuring control over fans, blowers, pumps, and led light with easy to use switch. For diyer enthusiasts, electronics hobbyists, and professional in need of precise speed adjustments for their 12v devices, this controller caters to a broad user base. For cooling systems, home automation projects, or any setups requiring variable speed control, this pwm controller enhances the functionality of your gear in workshops, garages, or hobbys spaces. With its plastic and metal constructions, this 12v pwm speed controller promise reliability and longevity, making it essential tool for maintaining the operational tempos of your devices. Specifications: Component:ABS+Metal Length:Approx.125cm/49.21inch Maximum support: 12V 30W 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.