Philips Hue Tap Dial Switch (White)Control up to three Rooms or a Zone with each individual button of the Tap dial switch, available in white. Turn the dial to dim and brighten the lights. Mount it to the wall, place it on a magnetic surface, or use it as a remote control. Key Features Wireless installation Battery powered (button battery CR2032 inc.) Set scenes instantly Use as a remote or mount to the wall Control multiple Rooms or Zones Rotate for smooth dimming and brighten easily