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#11
This one is non visible light no dot, nothing to be seen by the naked eye. It has a 400cm range which is more than enough for what I'm using it for. This rover goes at a pretty slow clip.
Just didn't want to have to worry about my cat or dog having an up close look see sniff etc. Or my grand kids picking it up for a look see etc.
Getting back to original topic, I use trackballs so no light coming out the bottom anyway. The sensor is aimed up at the ball. The only time I ever see it is when I take the ball out to clean it lol.