Multi-speed adjustment: only supports 12V standard PWM fan (4Pin fan) speed adjustment. 4Pin PWM interface is compatible with most fans (3-wire and 2-wire fans are not supported). SATA/DC power supply, high-power design, no need to worry about violent fans. Maximum output 60W, meeting the speed adjustment requirements of multiple fans and high-power fans. Warm reminder: The speed regulator housing is a 3D printed housing, and there may be slight printing defects on the occasionally, but it will not affect the use. Please do not buy if you mind. Port: 4Pin x 4 Power supply: Sata/DC Max output rate: 60W Adjustment range: 1-99% Colour:Black Material:plastic Package Contents: 1 x Fan Speed Controller 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.