Easy Installation: The Friends of Hue switch can be easily mounted anywhere using the included adhesive dots. Configure the buttons within 2 minutes using the Philips Hue app. Made in Germany: The switch is produced in a Berlin-based workshop in collaboration with GIRA and Senic. Minimalist Design: The Philips Hue light switch in GIRA E2 design can be integrated into all standard System 55 switch frames. Never charge: Thanks to Energy Harvesting technology (EnOcean), this Philips Hue switch is battery-free, wireless, and never needs to be charged. Range in open field: up to 300 m. Indoor range: up to 20 m.