I use it without an extension cord, the receiver is located about a meter from the mouse across the table - no problems. It goes into sleep mode after about 10 minutes of inactivity, exits instantly, almost imperceptibly (unless you specifically click in sleep mode without touching the mouse - then it will not be processed). I did not notice any difference in reaction time compared to wired mice, you can safely take it for dynamic games. Weight with battery - 97 g. I like light mice, and this is at the upper limit of comfort for me (the previous wired one weighed 122 g, and it was a bit heavy). Overall, I would say that if a symmetrical mouse suits you, then this is a great option, if not for the wheel. Let's see how it behaves over time.
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