Rozin Bathroom Replacement 16-inch Square Rainfall Shower Head LED Colors Top Sprayer Brushed Nickel Finish Bathroom Replacment Showerhead LED Light Top Showerhead;LED works by water flow,no battery is need 1/2" Standard connection,with rubber gasket and ball joint Square Shape,16-inch,color changes according to water temperature Rozin provides any replacement in future use,so contact unhesitatingly once you have any problem