The GE Cync Smart Light Dimmer Switch adds smart bulb functionality to traditional bulbs and keeps LED smart light bulbs smart. 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 or C by GE Smart 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 or C by GE 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 or C by GE Smart Switches so you can control the same light fixture from multiple switches ~ connecting the switches wirelessly still applies, even if the switches are on different circuits. Install the smart switches on your own with easy, DIY setup or with the help of a professional in homes built prior to the 1980s with a ground wire using 2.4 GHz WiFi. The smart light switch connects directly with Amazon Alexa and Google Home devices without a hub required. The LED dimmer switch works with most common residential wiring~no neutral wire required.