1、Adopts knob control, when the knob is rotated to the right, the brightness gradually becomes brighter, and when the knob is rotated to the left, the brightness gradually becomes dim. 2、Made of high-quality material, it is sturdy, durable, anti-aging and has a long service life. 3、Simple to use and easy to install, with this knob dimmer, bring you much convenience on dimming. 4、The dimmer adopts stepless dimming (3V-5V 12V-24V), 5/1 regular interface, making it easier to control your LED lights. 5、It can be widely used in LED (single-way) controllers and dimmers for ultra-thin light boxes and related products. The controller has up to 12 function options (DC 12V). 2 x LED Knob Dimmer Condition: 100% Brand NewItem Type: LED Knob DimmerMaterial: Plastic + Electronic ComponentsWorking Temperature: -20-60℃Supply Voltage: DC12-24VOutput: 1 WayStatic Power Consumption: <1WOutput Current: <2AOutput Power: <24WColor: White, Black (optional)Length: Approx. 39cm / 15.4inWeight: Approx. 73g / 2.6ozInstructions: 1. Connect the load line firstly, then connect the power line; Be sure that there is no short circuit between the connection lines before powering on. 2. Using knob to control, the function is as follows: When the knob is rotated to the right, the brightness gradually becomes brighter, and when it is rotated to the rightmost side, the brightness is the largest. When the knob is rotated to the left, the brightness gradually becomes dim, and when it is turned to the leftmost side, the light turns off.