2022 letters are present (the color is gray, like English). The keys are round or oval. I use it for 3 months without turning it off, while the batteries work. Keys for adjusting the volume, brightness, etc. are present, combined with F1-F12, the main adjustment. On Windows, you can definitely change it. On Ubuntu without software from the manufacturer, I don’t know if it’s done or not. There is support for MAC and keys for it. In general, very high quality, but if you compare the quality of keystrokes with MX Keys (not compact and 3.5 times more expensive), then it is slightly inferior. Is there support for Logitech Mouse Flow, when the keyboard switches to another device with the mouse - I don’t remember (I don’t use it myself).
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