Features: Experience seamlessly control with the USB Fan Governor, featured stepless speed adjustment to optimizing cooling efficiency for your devices. This multiuse speed regulator is design with extendable cable and support fan speed between 2.5V to 8V, ensuring a quiet and comfortable environment for any USB power fan. Great for techs enthusiasts and professional who use desktop computers, laptops, or mobile devices that require efficient heat dissipation. Perfect for home office, gamings setups, and travel cooling solution, this device enhances the performances of USB fan, desktop fan, and phone heat sinks. Use selected ABS, the USB Fan Governor combines functionality easily of installation, great accessory for maintaining great device temperatures. Specifications: Component: ABS Product Size: Approx. 5.2x4cm/2.05x1.57inch Input: 5V4A Output: 2.5-8V1A Usage: USB, data cable, suitable for desktop fan, notebook heat dissipation, mobile phone heat dissipation, USB water pump Package Includes: 1PC Stepless Speed Regulator note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color the item.