Technical Advantage: 220~240Vac 3-100W inline trailing edge phase-cut dimmer. The dimming process is completely silent and won't make a buzzing sound! The lowest brightness can be preset, and the dimming range is 0-100%. Excellent quality with overload protection, overcurrent protection, and overtemperature protection. Eye Protection: Dim the light 0%-100% to allow your eyes to gradually adjust to bright light or darkness; reduce eye strain and protect your eyes from excessively bright light. Energy Savings: Works with a maximum of 50 dimmable LED lights or 100 incandescent/halogen lights, dimming range 0-100% to reduce energy costs and extend bulb life. Note: Before purchasing, please confirm if your LED light is marked as "dimmable." If not, you cannot use this dimmer for dimming; you can only switch the light on/off, or the light will flicker. Cannot be used for speed control of inductors and fans. Color: Black Material: Plastic Package Contents: 1 x Dimmer Switch Note: 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.