This PWM Speed controller support 12V standard PWM fan (4Pin fan) speed adjustment, also support computer water cooling PWM pump head speed adjustment. This governor input port is USB Type-C female, Output is 12V PWM 4pin port. Fan speed adjustment range 0-100%. This governor is recommended to control the output power within 7-8 watts (12V 0.6A). Warm reminder: The speed regulator housing is a 3D printed housing, and there may be slight printing defects on the occasionally, but it not affect the use. Please do not buy if you mind. Fan Port: 4Pin x 1 Power supply: Type-C Max output rate: 8W Adjustment range: 1-100% Colour:Black Material:plastic Package Contents: 1 x PWM Speed Controller 1 x USB to TYPE-C power supply 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.