I got an ad for a color-changing sink light on Facebook the other day for about 3x the price that they’re on Amazon and decided to plunk down some money for them.
TL;DR – does the job, blue=cold, red=hot, blinking red=way too hot, green=good. Does the job, at under $10 build quality is what you would expect. Kids really like it.
On my American Standard faucet, screwed right in and works as advertised. I will point out that unless you get some Teflon tape there is going to be some leakage on the side because these are made of not well fitting plastic.
That said, it’s a drop on the side and not a stream so chances are it’s within a tenth of an inch of where it should have been anyway. You can see the dripping from the side even from the product photos.
Before you order, make sure your current faucet you can get the filter out of.