Function: This hub allows the controller to power up to 8 fans, and the rotary potentiometer can simultaneously adjust the speed of all 8 PWM fans. Note: The fan supports 3-pin and 4-pin fans. If a fan does not support PWM speed control, the speed control function will be invalid. The current supplied to the fans must not exceed the maximum current rating of 17A. Installation: The adhesive pad on the bottom of the fan hub can be used to secure it within the chassis. High Fan PWM HUB Speed Controller Product Size: 42 x 29 x 20 mm Weight: 12 g Supply Voltage: DC12V Supply Interface: 6-pin (2*3) interface Max Current: 17A Number of Fan Seats: 8 pcs Size: 42 x 29 x 20 mm Material: ABS Color: Black Package Contents: 1 set x Computer Chassis Fans Only the above package content is included; other products are not. Note: Light and different displays may cause the color of the item in the picture to differ slightly from the real item. The allowed measurement error is +/- 1-3 cm.