Portable Smart Lighting - With its built-in rechargeable battery, take your smart light wherever you go. Use go as the centrepiece for a romantic dinner, or take it outdoors to create that perfect party ambiance. Enjoy from 2.5 hours of brilliant smart lighting and up to 18 hours using the 'cosy candle' Light effect What's Required? - Nothing. This product works out of the box with the free ‘Philips Hue Bluetooth’ app. Simply plug in your new Hue go and connect to the Bluetooth app for in room smart lighting control. Play with Colour - Choose from 16 million colours including warm to cool White light to create an ambiance that suits any mood. Play with colour to create the perfect ambiance for film nights, parties, bedtime stories, or to just sit back and unwind. Control your lights from the Hue Go - Press the button on the portable smart light to choose from seven different light effects - Cool energising daylight, warm relaxing light, and the five dynamic light effects, or tap and hold the button to quickly cycle through colours 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).