PWM Dimming Controller For LED Lights or Ribbon, Adjustable Brightness Light Switch Dimmer Controller DC12V 8A 96W for Led Strip Light (White) Sizie:2 1/2" x 3 1/2" 12V 8A dimmer ,Quickly touching the hinge fades the lights to full brightness. Quickly touching again will fade the lights off. Touching and holding the hinge will fade up and down allowing you to stop at any brightness level. No flicking from the lights and no humming from the transformer