Technical advantages: 220~240 VAC 3-100 W online final phase dimmer, the dimming process is completely silent and there will be no beep! The minimum brightness can be preset and the dimming range is 0-100%. HIGH QUALITY: The LED rotary dimmer has overload, overcurrent and overheat protection functions and complies with CE and ROHS safety standards. Eye protection: turn off the light from 0% to 100%, let the eyes gradually adapt to light or darkness; Reduce the amount of glasses you wear to protect your eyes from damage caused by too bright light. Energy Efficient: Works with up to 50W dimmable LED bulbs or 100W incandescent/halogen bulbs, 0-100% dimming range reduces energy costs and extends bulb life . Note: Before purchasing, please confirm whether your LED light is marked as "DIMMABLE". Otherwise, you cannot use this dimmer to dim, only to turn lights or lamps on/off. Cannot be used to control the speed of inductors and fans. The LED dimmer complies with UKCA and CE standards! For lighting and controlling incandescent lamps, dimmable LED lamps, high-voltage halogen lamps and halogen lamps with electronic transformers. It cannot be used to control the speed of transformers, fans and induction motors. Turn the control knob clockwise: the light intensifies until it reaches maximum brightness. Turn the control knob counterclockwise: the light dims.