Fangrui Product Details Knob Adjust Speed Controller 3pin/4pin Fan Hub Multiple Type 12v 3pin/4pin High Accuracy And Good Performance Description: Material: Plastic, Metal Color: Black Types:1(8 Way 1 Knob 4d),2(8 Way 1 Knob Sata), 3(8 Way 4 Knob 4d), 4(8 Way 4 Knob Sata) Voltage: 0-12v Connectable Fans: 8 Power: 72w Adjustment Method: 1/4 Manual Adjustment Knob Power Supply Interface: 4d/sata Installation Position: Pci Position Of Pc Chassis Fan Interface: 4pin (3pin Can Be Connected) Specifications: 1)3pin/4pin Fan Hub: If Your Motherboard Lacks Fan Interfaces, Fan Hub Is The Neat And Tidy Way To Expand. Support 3pin/4pin Dual-type Standard Fan Port. 2) Knob Adjust: High Accuracy And Good Performance, Equipped With An Independent Speed Controller And The Speed Can Be Adjusted At Will. 3)multiple Type:1/4-knobs Control Speed Regulation, Power Supply Interface Supports 4d/sata, 4 Types For Your Choice. 4)universal: Widely Used For Pc Computer Water Cooling System, Easy To Install. 5)material: This Speed Controller Adopts Plastic And Metal Materials, Durable, Reliable, With Low Loss And Low Heat. Undefined