Fangrui Product Details 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. Port: 4pin X 6 Power Supply: Sata/dc Max Output Rate: 60w Adjustment Range: 1- Colour:black Material:plastic The Printing/appearance May Vary From Batch To Batch, But Will Not Affect The Use 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia