Pwm Speed Controller designed for 12V 4-wire fan/pump. This support standard fan control, also computer water cooling pump head adjustment. governor is recommended to control the output power within 7-8 watts (12V 0.6A). input port USB Type-C female.Output 4pin port. Built-in Dcdc boost circuit(boost 5V 12V).Built-in signal generator (make it able adjust speed). adjustment range 0-100%. Turn knob clockwise increase speed, counterclockwise reduce speed. application scenario of design mainly powered by charging head/rechargeable battery, common capacity generally 5V/2A, higher specifications are relatively rare, and parameters 12v/0.7A almost reach 5V/2A full supply, while taking into account small size so limited capacity. that current be controlled below 0.7A short time use 0.5A long use. Here means at maximum will vary proportionally according voltage: 5V 12V frequency: about 25KHz current: rated 0.5A/maximum 0.7A port: female port Output: 4Pin range: duty cycle 0-100% Colour:Black Material:plastic Package Contents: 1 x Controller supply cable Only above content, other products not included. Note: Light reflection different displays may cause color item in picture a little from real thing. measurement allowed error +/- 1-3cm.