Xking Led Light Strip Dial Dimmer - Single Color(Can also be the power switch), Easy Plug-in , Inline PWM 5-24v Dc5.52.1mm (White) Simple dimming control for LED lights,Can also be the power switch PMW (pulse width modulation) technology 12-24 Volts DC, 3-Amp max 0-100 dimming with a twist of a knob Energy efficient, reliable, 1-year warranty