Turn on the fun in your shower just by turning on the water, the LED lights will automatically light up and set the mood. They will even change colors automatically based on the water temperature. All this with no batteries, everything is self-powered by a built-in dynamo that takes advantage of the water pressure to create the energy to light the bulbs. Auto Temperature Detected Light Color Change! The shower head will automatically change colors according to the temperature of the water. So, you always know how the water will feel on your skin just by looking at it. When water temperature is ?90F, Green color will show automatically; When water temperature is between 91F~105F, Blue color will show automatically; When water temperature is between 106F~113F, Red color will show automatically; When water temperature is above 115F, Red color will flash immediately. Never be scalded again by entering a shower that is just too hot! Technical Details Brand Name: Cascada Showers Product Number: CSLED850003 Product Dimensions: 20 x 20 x 3/8 inches Size: 20"x20" Material: Stainless Steel Shape: Square Finish: Polished Chrome, Brushed Nickel, Matt Black, Polished Gold, Brushed Gold, Rose Gold, Oil Rubbed Bronze, and Antique Brass Installation Method: Screw-In / Ceiling Mount (ceiling mount arms are included) Hose Length: 60 inches Inside Diameter: 3/4" NPT Threads for Valve Connections inches Number of Handles: 2 Valve size: 7.2 x 5.2 inch Installation height: 100 Inch 3 Mode Function SPA Misty Mode Rainfall Mode Hand Shower Mode Package include: 1.20 Inch square LED shower system 2.Shower hose 3.Shower holder 4.Hand shower 5.Shower controller 6.Installation tool 7.Overhead shower arm Additional Details ------------------------------ Product description: Turn on the fun in your shower just by turning on the water, the LED lights will automatically light up and set the mood. They will even change colors automatically based on the water temperature. All this with no batteries, everything is self-powered by a built-in dynamo that takes advantage of the water pressure to create the energy to light the bulbs. Auto Temperature Detected Light Color Change! The shower head will automatically change colors according to the temperature of the water. So, you always know how the water will feel on your skin just by looking at it. When water temperature is ?90F, Green color will show automatically; When water temperature is between 91F~105F, Blue color will show automatically; When water temperature is between 106F~113F, Red color will show automatically; When water temperature is above 115F, Red color will flash immediately. Never be scalded again by entering a shower that is just too hot! Technical Details Brand Name: Cascada Showers Product Number: CSLED850003 Product Dimensions: 20 x 20 x 3/8 inches Size: 20"x20" Material: Stainless Steel Shape: Square Finish: Polished Chrome, Brushed Nickel, Matt Black, Polished Gold, Brushed Gold, Rose Gold, Oil Rubbed Bronze, and Antique Brass Installation Method: Screw-In / Ceiling Mount (ceiling mount arms are included) Hose Length: 60 inches Inside Diameter: 3/4" NPT Threads for Valve Connections inches Number of Handles: 2 Valve size: 7.2 x 5.2 inch Installation height: 100 Inch 3 Mode Function SPA Misty Mode Rainfall Mode Hand Shower Mode Package include: 1.20 Inch square LED shower system 2.Shower hose 3.Shower holder 4.Hand shower 5.Shower controller 6.Installation tool 7.Overhead shower arm