Returned to the store for marriage. It is very important for me to work correctly with the scroll wheel and the keys in it. The manufacturer gave advice on self-checking the device, but they did not help. It's good that the store issued a return. I have always trusted Logitech products, this is the first time I have encountered marriage. Most likely I have an isolated case. Everywhere reviews about this mouse are positive (which I was led to when buying). I will look for another mouse, I hope Logitech will not let you down again.
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