Description: 【Stepless Speed Regulator】: Speed Controller precisely controls fan speed, ensuring smooth output and enhancing device performance 【Application Scenario】: Electronic Stepless Speed Regulator easily adjusts fan operation for a quiet environment, perfect for homes, offices, or any space requiring noise reduction 【Compatibility】: Electronic Stepless Speed Regulator Switch is compatible with a variety of 12V devices, including blowers, fans, cooling fans, pumps, motors, and LED lights, making it ideal for computers and home appliances 【Convenient Design】: Stepless Electronic Fan Speed Controller features an easy to use switch with a clip attachment; quickly turn the fan on or off as needed for maximum comfort in any environment 【Material and Dimensions】: Variable Adjuster is made of plastic, with a total cable length of 140cm/55.12 inches and a switch measuring 5cm x 2.8cm/1.97 inches x 1.10 inches Size Chart: Total cable length: 140cm/55.12 inch Switch: 5cm x 2.8cm/1.97inch x 1.10inch Package Includes: 1 Speed Controller Note: Please allow slightly errors 1-2cm differences due to manual measurement.