Also, if it’s important for anyone, the LED below shines blue, it’s dim, it doesn’t interfere in the dark. I will continue to use the mouse due to the combination of advantages (although there are others), but, probably, I will have to buy a rug. ated after six months of use: the mouse is very voracious on batteries. I had to change it three times in six months. This is the first time I've encountered such consumption.