The Smart Light Dimmer Switch adds smart bulb functionality to traditional bulbs and keeps LED smart light bulbs smart so that you can dim any room with any dimmable bulb. The smart WiFi switch works as a dimmable light switch while enhancing the traditional bulb functionality to include out-of-home control, scheduling, and scene-setting. When CYNC Smart LED Bulbs are installed, the dimmable switch allows app or voice control even when power is turned off at the switch. Pair the dimmable light switch with CYNC Smart Bulbs in other fixtures like table lamps and control all your lights in the room from one wall switch. Our smart dimmer switch wirelessly connects with other CYNC Smart Light Switches so you can control the same light fixture from multiple switches. The smart dimmer switch also allows for single-pole, 3-way, or 4-way installation with other Cync smart switches. Install the smart switches on your own with easy, DIY setup or with the help of a professional in newer homes built after 1980 using 2.4GHz WiFi. The smart light switch connects directly with Amazon Alexa and Google Home devices without a hub required. Neutral wire--usually a white or gray wire--is required.