... 1. Water-powered, no battery needed 2. Music play automatically during shower 3. Eco-friendly Self-powered Singing ... LED light color changing with temperature:A. When water temperature is ≤32°C, Blue color will show ... automatically;B. When water temperature is between 33°C~41°C, Green ... C, Red color will show automatically;D. When water temperature is above 46°C, Red color will ...