What it does Simple USB fan speed controller with three-speed adjustment and integrated switches for direct, reliable control of your USB-powered fans. Key benefits — why you need it Precise control: Three selectable speeds let you balance cooling and noise to match your comfort and working environment. Broad compatibility: Supports up to 5V/3A, so it works with most USB fans, including desk fans, laptop coolers, and 5V blowers. Easy to use: Integrated switches provide immediate on/off and speed selection without software or complex setup. Practical upgrade: Adds tailored airflow control to existing USB cooling devices, improving comfort and usability. Features and performance Three-speed switching: Clear low/medium/high settings to reduce unnecessary noise or boost cooling when needed. USB-powered, supports 5V/3A: Designed to handle a wide range of USB fans within the specified current limit. Plug-and-play operation: Connect between your USB power source and fan for instant control. Typical uses Home office: Lower fan speed during focused work to reduce noise, and increase speed when your laptop or workspace gets warm. Gaming or media setups: Quickly boost airflow to peripherals or small cooling fans during extended sessions. Portable cooling: Control small desk fans or 5V blowers when using power banks, USB hubs, or laptop USB ports. Why it stands out Straightforward, tactile control that avoids app reliance or complicated installation. Compatible with a wide range of USB-cooled devices thanks to its 5V/3A support. Practical for anyone who wants simple, reliable control over USB fan speed and noise. How to use Connect the controller inline between your USB power source and the fan. Use the integrated switch to turn the fan on/off and select the desired speed setting. Compatibility reminder Designed for USB-powered fans that operate at 5V and draw up to 3A. Ensure your device’s requirements fall within these limits before use.