My Logitech K400 broke so I replaced it with this Arteck which works great! I replaced the AAA alkaline battery with a Nihm and since it has an auto sleep mode it saves battery life. You will love this typing keyboard: the feel is excellent and the key letters are clearly visible. QUALITATIVE keyboard in my opinion. I was researching how to reset a Logitech K400 that I replaced and found that holding three or more buttons for 30 seconds when it's off resets it. so it came alive again. I've had no issues using Arteck, like the top left button on Logitech's K400 as a function. If you want to type as much as you want, you'll appreciate the comfort of the Artech keyboard. I'll add that I use the Logitech K 400 for browsing most of the time and the very handy left button in the top left corner of the K400 is a feature I love and it's easy and simple to use. For you I have both with more than one machine and in fact you can connect senders for both on the same machine and use any keyboard. I'll add that you don't ask me questions as I can't waste time on that. Actually I prefer the K400, you decide.
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