This black inline switch and dimmer is designed to work well with dimmable LED; incandescent or halogen lamps.
Just press the button on the switch to turn your dimmable light on and off (a green indicator light will tell you if the switch is turned on).
Turning the button clockwise or counterclockwise allows you to adjust your light's brightness.
To set the minimum brightness for your dimmer; use a Phillips screwdriver to turn the minimum brightness adjustment screw at the back of the inline switch/dimmer.
This switch/dimmer comes with a 1-meter long wire for the plug (input) and a half-meter long wire for your dimmable light adapter (output).