The 12 volt led dimmer switch is a knob operated control. You can easily adjust the brightness or turn on/off the strip light or LED rope light by turning the knob. Save some energy cash by dimming the brightness of your indoor or outdoor lights with this dimmer. No flickering at low brightness, very smooth. Working temperature: -20-60 Power supply voltage: DC12~24V Output: 1 circuit Static power consumption: Less than 1W Output current: Less than 2A Output power: Less than 24W color:White / Black Material:plastic Package Contents: 3 x LED Dimmer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.