ENER-J 3 Gang Wireless Kinetic Switch (white body) + 3 x 500W RF recei – ENER-J Smart Homes
Wireless Light Switch Kit, No Battery No Wiring, Easy to Install On/Off Switches for Lights Lamps Fans Appliances, Self-powered Kinetic Remote Controlled L
ENER-J Wireless Light Switch uses kinetic energy no batteries required [Hands on Review and Test] - YouTube
MOES Wireless Light Switch Kit, Kinetic Switch, No Wiring No Battery Easy Installing, Outdoor Remote Control (1 RF Switch and 1 Receiver): Amazon.co.uk: DIY & Tools