... change with different temperature LED shower head. 2.No battery and power needed, safe to use. 3.Rohs & CE ... be designed by customer5. Self powered by water pressure--No battery or other electricity required.6. No pollution, environmental protection7 ... international standard hose, easy to installPatents protected:Patents in Europe, USA, Spain, Austrilia, Japan, Russia,..Packing details:20 pcs led ...