This module belongs to PM DC motor speed regulation, LED dimmer, with switch function, the speed control mode is PWM stepless speed regulation, can also be used to adjust the light, the module switch and output voltage are controlled by the potentiometer, turn on the switch clockwise Continue to turn clockwise to increase the output voltage.Control mode: speed control potentiometer (open clockwise, continue to rotate clockwise from 1% to 99% speedDuty cycle: 0%~99% (the 0% position is the leftmost closed state of the potentiometer) when the current is turned on, 0.002A (the governor does not need to be turned off for a long time, there will be no current)Efficiency: up to 98% efficiencyVolume: length 3CM (without potentiometer), width 2CM, height: 14CMProduct Name: PWM DC Motor Speed ControllerMaximum voltage: 16VMinimum voltage: 5VContinuous current: 10AShort-circuit current limit: 20A (less than 10 seconds)Speed control mode: PWM stepless speed regulation, can also be used to adjust the lightcolor:BlueMaterial:PCB+MetalPackage Contents:10 x PWM DC Motor Speed ControllersOnly the above package content, other products are not included.Note: Light 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.