This PWM speed controller supports 12V standard PWM fan (4Pin fan) speed adjustment, and also supports computer water cooling PWM pump speed adjustment. The input port of this controller is USB Type-C female, and the output is a 12V PWM 4pin port. Fan speed adjustment range is 0-100%. It is recommended to keep the output power of this controller within 7-8 watts (12V 0.6A). Warm reminder: The housing of the speed controller is 3D printed, and there may be slight printing defects occasionally, but it does not affect the usage. Please do not purchase if you mind. Fan port: 4Pin x 1. Power supply: Type-C. Maximum output power: 8W. Adjustment range: 1-100%. Color: Black. Material: Plastic. Package contents: 1 x PWM Speed Controller, 1 x USB to TYPE-C power 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 to be slightly different from the real thing. The allowed measurement error is +/- 1-3cm.