This Philips Hue Dimmer switch makes it easy for anyone in the home to control Hue smart lights with a touch of a button, whether or not they have the Hue app or a voice device handy. The dimmer switch adds more convenient ways to control your Hue lights whether for guests, kids, or even yourself. The dimmer switch lets you turn lights on or off, dim or brighten, or toggle between four of your favorite light scenes. You can also get the best light based on the time of the day, perfect for tuning light to your circadian rhythmn. Three clearly marked buttons make the dimmer switch simple to use. With it's battery-powered design and the included adhesive, the dimmer switch can be placed anywhere. The long-lasting battery has a minimum lifetime of 3 years. It's magnetic backing even lets you attach it to the refrigerator or other metal surfaces. A Hue Bridge and Hue lights (sold separately) are required to connect the dimmer switch to your Hue set-up. The Bridge unlocks the full power of Hue smart home lighting by unlocking features like multiple room control, out-of-home control, automations and more.