This showerhead with a 7 step filter is a great way to keep your skin healthy when dealing with hard water. *I like the design due to its water temperature sensor. It has a three-color LED.Blue=cold waterGreen=lukewarm waterRed= hot water This showerhead requires no batteries.It offers a 7 stage filter, making the water safe from… Continue reading (Review) Ionpolis water temperature sensitive 3 LED shower head.