SDS-A23 RGB LED Negative Ions Shower Head Features: 1. Brand new and high quality. 2. When water flows down, the LED will light instantly and automatically. 3. The color''s change remind you the water''s temperature. 4. Offer you a delight & wonderful experience. 5. No batteries no wire needed. 6. Easy to install. 7. Ideal for bathroom or kitchen to make it fantastic. Color: 1. When water temperature is < 31 Degree Celsius, green color will show automatically. 2. When water temperature is between 32-43 Degree Celsius, blue color will show automatically. 3. When water temperature is between 44-50 Degree Celsius, red color will show automatically. 4. When water temperature is above 51 Degree Celsius, red color will flash immediately. Package Contents: 1 x LED Shower Head