Bought a second one for work. Work all day at the computer. I change batteries about once a year. The radio sensor is plugged into the side of the keyboard, i. E. next to the mouse at a distance of 10 cm from it. With its pros: Surface quality, extremely rare battery replacement, scroll wheel to the side (in general, you get used to it). Has cons: Rubber side pads are comfortable to the touch, but over time they wear out and do not look very aesthetically pleasing. However, periodic cleaning with wet wipes - and everything is fine.
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