Usage Tips:1. The product is made of high-quality PLA environmental shell material, good toughness and wear resistance, excellent electrical insulation 2. The input of the product is TYPE-C female port, can be perfectly compatible with TYPE-C port charger (PD) as a power supply device use 3. solution, integrated power supply + speed control, more convenient to use. 4. Stable performance, built-in PWM signal generation circuit and DC-DC boost circuit. 5. Small speed regulator has a big role, compatible with most of the USB fan pump speed, can also be applied to routers / small host / soft routing and other DIY cooling Description: PWM speed regulator input for the C port, the output is a small 4Pin socket for PWM fan, built-in DC-DC boost circuit, 5V boost to 12V, speed regulation is achieved by outputting PWM signals, because the built-in boost circuit has losses (efficiency of roughly 85%), the output current is too large then there be significant heating, it is recommended that the output current is controlled at 0.5A or less, for a short period of time can be up to 0.7A. Specifications: Product name: PWM speed regulator Input voltage: 5V Output voltage: 12V PWM frequency: about 25KHz Output Current: Rated 0.5A Upper limit 0.7A Case material: PLA+ (FDM molding) Input port: USB TYPE-C female port Output port: PWM 4Pin (KF2510) Speed control range: PWM duty cycle 0- Colour:Black Material:Plastic Package Contents: 1 * Speed Controller 1 * short cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.