Size: 6*6*4cm / 2.34"*2.34"*1.56" Color: Black 1. Safe and Reliable: The Fan Control Cable has three gear adjustments that can accurately adjust the fan speed, ensuring stable fan operation and reducing the risk of malfunctions. 2. Convenient and Easy to Use: The operation is simple, without requiring additional tools or power sources, making it easy to adjust the fan speed. 3. Energy-saving and Environmentally Friendly: By controlling the fan speed, it can effectively reduce energy consumption, save energy, and achieve the purpose of environmental protection and energy conservation. 4. Multi-functional Application: It is not only suitable for computer fans, but can also be used for controlling the fan speed of other household appliances, improving the user experience. 5. Beautiful and Practical: The design is simple and generous, and the appearance is both beautiful and practical. It is also compatible with fan wires, making it more comfortable to use. Package includes: 1* USB Fan Speed Controller.