Thank you for viewing. This item is brand new and unused. Thank you for your consideration. ■ PWM Control Method PWM control lighting control is a method where a dimmer sends a dimming signal (PWM signal), and the power supply unit on the fixture side controls the brightness of the light source. (In addition to the two power supply wires, two dimming signal wires are required.) Because the input power of the lighting fixture is not switched, the dimming changes smoothly, and the dimming range can be fully controlled. It can be installed in a single-gang box, and the signal line output supports up to 200mA. There is no product description.