PRODUCT DESCRIPTION:Mama bear’s shower was blue and too cold. Papa bear’s shower was red and too hot. Baby bear’s shower was purple and just right. This battery-powered， color changing shower head is water activated and changes color according to the temperature， which means no more Chilly Water Booty Scoot. Whether you like your water hot or cold or somewhere in between， your color changing shower head will get the temperature just right.TECHNICAL SPECIFICATIONS:Easy installationTemperature sensitive faucet light designed to provide a visual of the water temperatureWater glows Blue when it's safe to touch & switches to Red when it gets above 38 °C (100.4 F)Light is activated by the water pressure and turns off automatically when the water shuts offAdapters included to fit faucets with diameters of 23.5mm or 19.6mm