The On/Off Smart Switch adds smart bulb functionality to traditional bulbs and keeps smart bulbs smart. The smart Wi-Fi switch adds out-of-home control, scheduling and scene setting to traditional bulbs. When Cync smart bulbs are installed, the smart switch allows app or voice control even when power is turned off at the switch. Pair the Smart Switch with Cync Smart Bulbs in other fixtures like table lamps and control your all your lights in the room from one wall switch. This On/Off Smart Switch wirelessly connects with other Cync 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. Simple DIY set up. The Smart Switch connects directly with Google Home and Amazon Alexa devices without a hub required. Works with most common residential wiring– no neutral wire required.