Compact DC motor/fan speed controller with integrated on/off switch and smooth stepless adjustment Key benefits - Precise, stepless speed control: Stable adjustable output voltage between 2.5V and 8V lets you set fan or motor speed smoothly without steps or abrupt changes. - Simple, intuitive operation: A single potentiometer knob both adjusts speed and acts as an on/off switch for quick control. - Durable construction: Potentiometer and housing use PC + metal for reliable, long-lasting use in everyday and hobby applications. - Broad compatibility: Designed for small DC motors and fans operating from 4–12V DC. Main specifications and features - Supply voltage range: 4–12V DC - Stepless output voltage: 2.5V–8V (stable change) - Rated power: 5W (do not overload) - Maximum current rating: up to 5A - Control: Potentiometer with built-in switch (turn knob clockwise to increase speed; counterclockwise to decrease; push/turn for on/off function) - Materials: PC + metal construction for durability - Package contents: fan controller module Practical use scenarios - PC or electronics cooling: Reduce fan noise by lowering speed when full cooling is not required. - Aquarium or small pond equipment: Regulate water pump or aeration fan speeds to match tank needs. - Hobby and DIY projects: Control small DC motors in model boats, robotics, or tabletop machinery for smoother operation. Compatibility and installation notes - Intended for inline use between a 4–12V DC power source and a compatible motor or fan. - Observe the rated power (5W) and current limits to avoid overloading the controller. - Ideal for small DC devices that accept an adjustable input voltage in the specified range. This controller delivers straightforward, reliable speed regulation for small DC motors and fans, with easy operation and durable construction for everyday and hobby applications.