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 0-100%. Premium quality: The LED rotary dimmer has overload, overcurrent, overheat protection and responds with CE and ROHS safety standards. Eye protection: Turn off the lights 0% - 100% 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 - 100% 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.