What's 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 Smaller Spaces: With a brightness 800 Lumen, these LED bulbs provide the right level of light that is bright enough to read on the couch, listen to music, or simply relax in your bedroom. Dimmable Cool To Warm White Light - Play with 50,000 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 speakers/displays 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) to your cart and unlock full home control, either when you’re home or away.