LED Dimmer Knob with Rotary Control Switch - pwm dimming control for 12 volt LEDs, dim up to 8 amps at 12V: car automotive, marine, low voltage under cabinet lights ADJUSTABLE BRIGHTNESS AT YOUR FINGERTIPS: With a simple turn of the knob, you can dim down, or brighten up your LEDs. SMOOTH CONTROL: Durable components and a smart energy-saving circuit is designed for steady and smooth operation. No flickering, nor jumping between brightness. PANEL MOUNT: You can drill a hole and mount it to a panel. The knob slides on and off from the control shaft. 12 VOLT, LOW POWER CONSUMPTION: Works on any 12 volt DC system. Just hook up power wires to the input side, and your LEDs to the output side. Power & control up to 8 amps (thats a ton of LEDs!) with ease. LIFETIME GUARANTEE: We sell products that last. Our rock-solid guarantee means we'll replace your LED dimmer if there's ever a problem. Pass it on to the next generation with confidence.