Ⅰ. Control your fan performance with our fan controller, crafted from durable ABS material for a long-lasting and reliable experience. This compact device measures approximately 7.8 x 3.3 x 5 cm and weighs approximately 118 g, making it easy to carry and store. Ⅱ. Main Features: Electronic Stepless Speed Controller: Smoothly and precisely control the operating speed, flow and brightness of your equipment. Ⅲ. Universal Application: Suitable for a variety of devices, including lighting, fans, power tools, massagers, pumps, etc. Ⅳ. Smooth Speed Regulation: Rotate from high to low speed, ensuring safe and comfortable operation and preventing fan burnout. Ⅴ. Durable Construction: Made of materials, this fan controller features durability and stability, ensuring a long service life. Ⅵ. Easy to Use: With an intuitive design, this electronic stepless speed controller is easy to operate and adjust, making it suitable for professionals and hobbyists. Ⅶ. Specifications: Material: ABS; Size: Approx. 7.8 x 3.3 x 5 cm / 3.1 x 1.3 x 2.0 inches; Weight: Approx. 118g / 4.2oz Ⅷ. Package includes: 1 x Fan Controller; 1 x User Manual