Description: 【Power Interface】: Type C; Power supply method: 5V boost to 12V; Supported power: 20W (actual output power after boosting when the input power is 5V 4A=20W; 12V 1.5A~18W); Output interface: 4Pin (KF2510); Speed control method: PWM; Output : 12V 【Features】: Can draw power from any device with a USB interface, such as: computers, routers, ordinary power banks, and ordinary power adapters 【Precise Control】: PWM speed regulation enables accurate fan speed adjustment, reducing both energy consumption and noise levels 【Backlight Feature】: 4 Pin pwm fan controller is equipped with a backlight for easy operation in low light environments or at night 【Compact Design】: Pwm fan speed controller, space saving structure supports multiple installation methods, making it ideal for diverse DIY applications Specification: Material: Plastic   Size Chart: Product Dimensions: 4.5 cmx4.5 cmx3 cm/1.77 inchx1.77 inchx1.18 inch Package Includes: 1 PWM Fan Speed Controller Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.