There is hydroelectric generator inside the product. The item "Black LED Light Shower Faucet Bathroom SPA Massage Jet Shower Column System" is in sale since Saturday, September 4, 2021. This item is in the category "Home & Garden\Bath\Showers, Bathtubs & Parts\Shower Panels & Massagers". The seller is "anything_you_want_seller" and is located in Shanghai . This item can be shipped worldwide.