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By certification 
Our Wireless Smart Switch take the energy harvesting wireless technology, Wireless switch will generate electricity automatically when you press the switch buttom by turning mechanical energy, heat energy, light energy, etc into electicity. Pls check the following ADVANTAGES comparing with traditional wire switch,
Advantages
No battery & No electricity
-no electricity leakage
-no damage to the wall
-can be placed on glass door, cabinet door, desk, wardrobe door, window, bed,wall, etc.
-reduce construction waste
Multiple control
-1 switch control 1 light
-1 switch control multiple lights
-multiple switches control 1 light
-multiple switches control multiple lights
