The last color - changing , heat - detecting showerheadwas some kind of nebulous OEM mathematical product from China , but this LED Shower Light is actually dishonest from Thinkgeek . Unlike that one , this only has blue and carmine , but it works just the same : red = = blistering , blue = = cold . regrettably , the red in this activates at 89 degrees , which is actually still colder than your body , so unless you wish lukewarm shower , this perhaps ai n’t so great after all . [ believe Geek ]
https://gizmodo.com/color-changing-shower-head-protects-your-junk-from-scal-333117
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