Important Parameters: Applicable voltage: AC 220-240V, 50/60 Hz, rated load: 1W ~ 150W, excellent quality with overload protection, overcurrent protection, overheat protection. Note: Before purchasing, please make sure your bulb is compatible with a dimmer switch, this dimmer switch is only suitable for dimmable bulbs, halogen lamps and incandescent lamps. Otherwise, the bulb can only be turned on/off, it can't dim, maybe the bulb doesn't expect or flashes. There is no ground wire terminal - Please do not purchase if there is a ground wire. High Intensity: Quiet and flicker-free during dimming, provides a uniform attenuation range from 0 to 100%. Due to the diversity of bulb brands and adjustment circuits, there may be compatibility issues between the dimmer and bulb. If you have any questions, please feel free to contact us. Works with Max 150W Dimmerable Bulbs: Black dimmer line rotary dimmer, AC220-240V input voltage, maximum power of the 150W lamp, pay attention to the lamp power during dimming. Application: Suitable for LED floor lamp, LED table lamp, LED filament lamp, transformer for low voltage halogen lamp, incandescent lamp. Not suitable for use with fluorescent bulbs, flat panel display fittings, toroidal transformers or electric motors.