Control Method: Adjust voltage to control fan speed. Fan Ports: Includes 3Pin*2 (MX2.54 2510), 2Pin*2 (XH2.54), and 2Pin*2 (PH2.0). Output Power: Up to 4A with 12V input and 1.5A with 26V input. he governor has no active heat dissipation and is used with a total power not exceeding 40W. This compact and efficient speed controller is ideal for various DIY cooling and temperature adjustment projects.T Power supply interface: DC 5.5*2.5 interface Color: Black Material: plastic Package Contents: 1* 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.