Whats Required-Nothing This product works out of the box with the free ‘Philips Hue Bluetooth’ app. Simply screw in your new bulb and connect to the Bluetooth app for in room smart lighting control Designed For Full Rooms With a brightness of 350 lumen these smart LED bulbs provide the right amount of light to fill areas of your living room or kitchen. Dimmable Cool To Warm White Light-Play with 50000 shades of tuneable warm to cool white light to put you in the mood to work play or relax. Start your morning off on the right foot with cool energising bright white light or settle down for the night with golden tones. Control Lights With Your Voice-Works with all Echo smart speakersdisplays and Google Nest devices for hands-free voice control Philips Hue Bridge sold separately is required for Echo 1st Gen and Echo Dot 1st Gen. Unlock Your Homes Full Potential-Add a Philips Hue Bridge sold separately optional and unlock full home control either when you’re home or away.