1.The difference of 3 colors shower head and 7 colors shower head:
3 colors LED shower heads: Temperature control; Changes colors according to the water temperature, Green color(temperature <30℃/85℉),Blue color(31℃-39℃/85℉-105℉),Red color(40℃-50℃/105℉-120℉). When the water reaches these temperature ranges, only one color led light comes on.
7 colors LED shower heads: NO temperature control. Automatically flashes 7 colors continuously in any water temperature. Both no battery, very safe, using water flow to generate electricity.
2. Negative ionic stones make up filter system to purify the shower water, effectively eliminate harmful chlorine and its vapors, reduce residual impurities in water. Improve your dry hair and skin, reduce oil secretion, increase cell viability, make your skin more smooth and reduces hair loss.
3.Easy to Install : it is general size, fits any standard size hose.
4.No leaks and Solid Build. Also easy to disassemble and clean. High Pressure and 30% Water Saving.