Philips Hue White Ambiance A19 60W Equivalent Dimmable LED Smart Bulb (Works with Alexa Apple HomeKit and Google Assistant) Works with Alexa for voice control (hub required, Alexa device and hub sold separately). For the full Hue experience and to take advantage of voice activation purchase the Philips Hue Hub (Model: 458471). Search "Philips Hue Hub" or "B016H0QZ7I" to find this product on Amazon. With wireless control on your smartphone or tablet, choose the perfect light setting for any mood or activity such as reading or relaxing, concentrating, or energizing. Requiring the Hue Bridge (sold separately) for the full Hue experience, this bulb fits standard-size table lamps. Install the LED light as you would install ordinary bulbs, pairing them with the Hue Bridge, which allows you to control smart-bulb-equipped lamps and overhead lights via the Philips Hue App. Easily expand your lighting system with accessories (sold separately), such as a Hue Dimmer Switch, Hue Tap, or Hue Motion Sensor. Pair it for automation with your existing Nest or SmartThings system.