Description: 【Multifunctional】The RGB LED Light Dimmer Knob is compatible with various LED light sources, including LED strips, rigid LED strips, and LED modules, enabling flexible lighting control. 【Advanced】The LED Light RGB Knob Dimmer employs advanced PWM digital dimming technology, allowing for smooth and precise adjustment of RGB LED brightness. 【User Friendly Design】The Adjust Brightness Switch features three manual rotary knobs for adjustment of the red, green, and blue channels—easily mixing any colors and brightness to meet your needs. 【Safe and Convenient】Simple wiring design: connect the load wire first, then the power cord; ensure there are no short circuits before powering on. Three output channels provide reliable performance. 【Easy to Use】Intuitive rotary controls allow you to smoothly increase or decrease the brightness of each color channel—rotate clockwise to brighten, and counterclockwise to or turn off. Specification: Material:plastic Size Chart: 13.6cmx5cmx4.5cm/5.35inchx1.97inchx1.77inch Package Includes: 1 RGB LED Light Dimmer Knob Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.