Single function,changed 3 color:blue,green,red LED shower head 1)Single function,changed 3 color:blue,green,red 2) ... ABS,chrome plated 3)Excellent quality 4)Competitive price LED shower head: will change its color by dettecting water temperatureRGB color ... battery is needed 2. when water flows down, the LED will light instantly and automatically A.when water temperature is≤32 green ...