Works with Alexa for voice control (Alexa device 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. Automate your lighting experience with Philips Hue and control your lights from home or away. Create light schedules from the Philips Hue App and never come home to a dark house. 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.