Great product! I have several K400 plus and an older K400. The battery life is more than 1 year with many hours of operation per day. K400 plus vs K400: The new version looks more robust with an improved shortcut key layout. The mouse pad works perfectly. I can't give it 5 stars because the old version's print is much bolder and easier to see in low light. Nevertheless, I recommend this product. Thank you Logitech for another quality product at a reasonable price.
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