Usage Tips:Technical advantage: 220~240VAC 3-100W In-line 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-. Premium quality: excellent quality with overload protection, over current protection, over temperature protection and corresponds to CE and ROHS safety standards. Eye protection: Turn off the lights 0% - to let your eyes gradually adapt to bright light or darkness; Reduce glasses and protect your eyes from too bright lights. Energy Savings: Works with up to 50 watts of dimmable LED bulbs or 100 watts of incandescent/halogen bulbs, range of 0 - dimming to reduce energy costs and extend bulb life. Note: Before purchasing, please confirm whether your LED light is marked as "DIMMABLE". If not, you can't use this dimmer for dimming, you can only turn on/off the lamp or lamp. Cannot be used for inductor and fan speed control. Some LED lamps are poorly dimmable due to their construction and can easily cause flickering (e.g. R7S incandescent lamps).< /p >