1、LED brightness controller with independent knob dimming (DC 12V‑24V), easy to control. 2、Can realize stepless dimming, (12V‑24V), 5.5/2.1 conventional interface. 3、It can be widely used ultra‑thin light boxes and related products LED (single circuit). 4、Stepless dimmer, simple to install and use, easy to adjust the brightness of the light. 5、Rotating control, when knob is turned to the right, it gradually becomes brighter; when it is turned to the left, it gradually becomes darker. Item Type: Brightness Dimmer Material: ABS Color: Black Weight: Approx. 135g / 4.8oz Length: Approx. 35cm / 13.8in Working Temperature: -20-60℃ Output: 1 Circuit Static Power Consumption: <1W Output Current: <2A Output Power: <24W Instructions for Use 1. Connect the load line first, then the power line; make sure there is no short circuit between the connecting lines before powering on; 2. It adopts rotating control and its functions are as follows: When the knob is turned to the right, the brightness gradually becomes brighter, and when it is turned to the far right, the brightness is maximum. When the knob is turned to the left, the brightness gradually becomes darker, and when it is turned to the far left, the light turns off. 4 x Dimmer