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 85percent ), the output current is too large then there will 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 0-100percent 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.