This black foot switch and dimmer is designed for use with floor lamps, so you can just step on the switch to effortlessly turn your floor lamp on and off and adjust the brightness of your floor lamp with the foot switch. Step on the large round button on the switch to turn your dimmable floor lamp on (the green indicator light will also turn on). Step on it again and hold your step (long press) to alternate between your lamp's minimum and maximum brightness. Another short step on the button turns your floor lamp off (also turning off the green indicator light). Two adjustment screws at the back of the switch allow you to set the minimum brightness and dimming speed when you long press the button. Use a Phillips screwdriver for this. The foot switch and dimmer come with a 2-meter-long wire piggyback power plug works well with dimmable LED, incandescent, or halogen lamps.