USB Fan Speed Controller, DC 5V Inline Regulator Switch for Precise Control and Low Noise Cooling

Compact metal USB fan controller that gives simple, reliable control over fan speed and airflow. Key benefits: - Precise speed control lets you set the fan wind level to match personal comfort and room conditions. - Airflow adjustment reduces unwanted drafts while maintaining effective cooling when needed. - Built-in mute function minimizes operational noise for a quieter workspace or bedroom. - Low power operation at 5 V DC keeps energy use minimal while maintaining consistent performance. - Small, multifunction switch module replaces bulky controllers and adds convenience for any USB powered fan. How this product solves common problems: - Eliminates constant on off switching by letting you fine tune fan speed for comfort and power savings. - Reduces noise during work or sleep with a dedicated mute option. - Offers a compact, durable metal design that withstands daily handling and frequent adjustments. Compatibility and performance: - Designed for USB powered fans and devices that run on 5 V DC. - Inline controller provides smooth, stepless adjustment suitable for a wide range of small fans. - Metal construction for durability, with a compact footprint that fits most setups. Practical use scenarios: - Desk cooling: Quickly reduce fan noise and adjust airflow for focused work without changing fan position. - Bedroom use: Lower fan speed or activate mute for a quiet sleeping environment while maintaining gentle airflow. - Portable cooling: Attach to USB fans used with power banks or laptops to balance cooling and battery life. Specifications: - Material: Metal. - Color: As shown in the product image. - Size: As shown in the product image. Note that 1 inch equals 2.54 cm. - Operating voltage: 5 V DC. - Package includes: 1 USB fan controller. Notes: - Actual item color may vary slightly due to monitor display and lighting conditions. - Please allow a measurement tolerance of 1 cm to 2 cm due to manual measuring.