1, 2 or 3 Gang Kinetic Switch. Wireless & Battery-free.
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acegoo Wireless Lights Switch Kit, No Wiring No Battery, Quick Create or Relocate On/Off Switches for Light LampAppliances, Self-Powered Remote Control Switch for House Lighting (Switch and Receiver) : Amazon.co.uk: DIY &
RunLessWire - The Original Self-Powered (NO Batteries) Wireless Light Switch & Receiver Kit No WiFi Needed DIY, Remote 150+ft RF Range - 3 Way: 1 Receiver, 2 Switches - White - Amazon.com
RunLessWire 3-Way Wireless and Battery-Free Switch Kit For Lights (Includes 2 Single Rocker Switches and 1 Receiver) RW9-S2KWH - The Home Depot