ITEM NAME:DC12-24V LED Dimmer Switching Controller for LED Strip Light Adjust Brightn OS Specifications: Type:Manual Dimmer Color: Black Input: DC 12V-24V Working Temperature: -20 °C-60 °C max load current : 2A each color product size:(Approx) L66x W33x H32mm There is a White knob, just twirl it to adjust the brightness of LED lights Feature: led Dimmer is a controller that it can adjust brightness infinitely, its control mode is knob-operated control, you could adjust light to the appropriate lighting brightness in accordance with your actual need,Perfect tools for most lighting purpose. You can conveniently adjust the brightness of your LED bulbs/Led Strip with this dimmer. 0~100% brightness adjustable. Easy to install and simple to use. Adjust the light soft and stable, no flickering. Mainly use to adjust single color LED light lamps and Led Strip. Package Included: 1xManual Dimmer.0~100% brightness adjustable. Easy to install and simple to use. Adjust the light soft and stable, no flickering.