The Logitech website did not accept the serial number, neither from the box, nor from the mouse (this can be seen on the screen on the left side). But when I wrote to the bot on the site, he recognized the mouse by the number (on the right). What this means is not clear, but maybe it will be interesting to someone or you can explain to me) While configured buttons only for work. Illustrator, photoshop, sketchup, very convenient, I'm delighted. Then I'll try for revit and 3d max, let's see what happens. The box came whole, not wrinkled or opened, everything looks fine. I put 4ku because of the legs and wires
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