Technical Advantages: 220~240 VAC 3-100W inline full-phase dimmer with silent, flicker-free dimming. Minimum brightness can be preset, with a dimming range of 0-100%. HIGH QUALITY: The LED rotary dimmer includes overload, overcurrent, and overheat protection functions, meeting CE and ROHS safety standards. Eye Protection: Smoothly transition light from 0% to 100%, allowing your eyes to gradually adjust to light or darkness, reducing the need for glasses and protecting them from damage caused by overly bright light. Energy Efficiency: Works with dimmable LED bulbs up to 50W or 100W incandescent/halogen bulbs, with a 0-100% dimming range to reduce energy costs and extend bulb life. Note: Before purchasing, please confirm if your LED bulb is labeled "DIMMABLE." Otherwise, this dimmer can only turn lights on/off. It cannot be used to control the speed of inductors or fans. The LED dimmer meets UKCA and CE standards! Suitable for lighting and control of incandescent bulbs, dimmable LED lamps, high-voltage halogen lamps, and halogen lamps with electronic transformers. It cannot be used to control the speed of transformers, fans, and induction motors. Turn the control knob clockwise: light intensifies until maximum brightness is reached. Turn the control knob counter-clockwise: light decreases.