Usage Tips:Technical Advantage: 220~240Vac 3-100W inline trailing edge phase-cut 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-. : quality with overload protection, over current protection, over temperature protection. Eyes Protection: the lights 0% - to let your eyes gradually adapt to bright light or darkness; reduce eyestrain and protect your eyes from overly bright lights. Energy Savings: Works with max 50 of dimmable LED Bulbs or 100 of Incandescent/Halogen Bulbs, Dimming range 0 - to cut energy costs and extend bulb life. Note: purchasing, confirm whether your LED light is marked as "dimmable". If it is not, you cannot use this dimmer for dimming, you can only turn on/off the lamp or the lamp flickers. Cannot be used for speed control of inductor and fans. Colour: White Material: Plastic Package Contents: 1 x dimmer switch Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.