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 surface occasionally, but it will not affect the use. Please do not buy if you mind.Port: 4Pin x 4Power supply: Sata/DCMax output rate: 60WAdjustment range: 1-99%Colour:BlackMaterial:plasticPackage Contents:1 x Fan Speed ControllerOnly 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.