Features: The 12V dimmer switches combines a rotary ON/off dimmer with QC3.0 USB port, delivering 24W fast charging and smooth 0% to 100 percentage brightness control for LED/halogen light in vehicles. build with strong aluminum housing, this 60W rate switches features PWM dimming technology for flickers without operation and enhances heat dissipation in demanding environment. Ideal for owners, enthusiasts, and trailer operators search reliable lighting control and rapid device charging during road or mobile workspaces. Perfect for adjusting cabin mood in campers, optimizing task lighting in utility , or creating mood lighting in boats cabins without compromising charging capabilities. Engineered with corrosion resistant materials and small design, this double function switches ensures year round performances as both a accuracy dimmer and power center for USB dependent devices. Specifications: Component : aluminum Single size: about 5x6x7cm/1.97x2.36x2.76inch Package Includes: 1xDimming switches note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.