Technical advantage: 220~240VAC 3-100W Inline End Phase Dimmer, the dimming process is completely silent and will not make a buzzing sound! The lowest brightness can be preset and the dimming range is 0-100%. Superior quality: The LED rotary switch has overload, overcurrent, and overheating protection and meets CE and ROHS safety standards. Eye protection: Turn off the lights 0% - 100% to allow your eyes to gradually adapt to bright light or darkness; Reduce glare and protect your eyes from too bright light. Energy saving: Works with up to 50 watts of dimmable LED lamps or 100 watts of incandescent/halogen lamps, 0 - 100% dimming range to reduce energy costs and extend lamp life. Note: Before purchasing, please confirm whether your LED indicator light is marked as \"DIMMABLE \". If not, you cannot use this dimmer for dimming, you can only turn the light or lamp on/off. Cannot be used for speed control of inductors and fans.