Rozin LED Changing Color 10-inch Round Top Shower Head + Wall Mounted Shower Arm Black Color Bathroom Replacement Rainfall Showerhead 10-inch Sqaure Rainfall Showerhead,13.7-inch long shower arm LED works by water flow,No battery is needed;color changes according to water temperature 1/2" Standard connection,with ball joint and rubber gasket Rozin provides any replacement in future use,so contact unhesitatingly once you have any problem