WYQN LED Shower-Head Water Temperature Controlled Bathroom Spray 3-Color of LED lights Changes Automatically According to Water Temperature Safety Shower, 8 inch WATER TEMPERATURE SENSOR-Color of LED lights changes automatically according to water temperature.LED emitting color: red,pink and blue ENVIRONMENTAL PROTECTION-LED lights are powered by running water, no batteries and any other power supply INSTALLATION- Tools-free Installation. Connects in minutes to any standard overhead shower arm, no tools required SECURITY-Let the children more safe bathing, avoid scald INNER CORE-Inner core structure is fully enclosed,which can prevent rust, improve the efficiency of the motor and ensure a stable working condition