Sunco LED Smart Bulbs work in combination with your WiFi router and an app on your smart phone or compatible smart device. When you select 2.4G network on your dual-band router, the reach is up to 150 feet indoors. Please position your router in a central location of your home or office. We recommend you place the router on a second floor for a 2-story home.Note that if there are multiple walls between the router and the smart bulb and your app this may affect router signal strength and your connectivity. In that instance, a WiFi extender is recommended.