The problem with the receiver - after two months of intensive use, problems began, namely: when the left mouse button is pressed, a double-click occurs, and during a drag-n-drop operation, while the button is physically pressed, the button is released. I found a way to detect a glitch, it's enough just to make a selection on the desktop or in the explorer and within 1-10 minutes the selection disappears when the left mouse button is physically pressed. Support for logitech is normal, there is support (support on the site) in 2022, but this is what they answered me in correspondence: "The receiver must be connected directly to the computer as we do not support USB hubs." That's why such things are not mentioned on the site between advertising Features and Specifications, a Limitations section could have been added. "it is obvious and well known that radio devices can conflict with each other, therefore, it is necessary to check the device on another PC." I did as requested, bravo, now instead of 10 m I got 1 m radius of action. The system unit is under the table, before I could go to the kitchen and control the mouse (my wife and I tried), now if I move 1 m away from the computer, the mouse stops working. I had to cut down the Wi-Fi router - does not help "connecting to another computer is a prerequisite for obtaining warranty service. Please find an opportunity to test the device on another PC." "Please note that Logitec devices are not repaired, and if they break under warranty, they will be replaced." "Please note that unfortunately we do not support device replacements in Ukraine." These are the pies from Logitech, I ordered A4Tech G10-770L - very similar to Marathon, but half the price, but it only has 1xAA battery batteries - the main reason why I bought Marathon
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