I bought this unit in October 2019, had no problems until recently, the last 2 months , I had to repeatedly change the battery in the mouse, and it constantly activates the cursor slowly, sometimes it takes a few minutes for it to appear on the screen. Edited on 05/26/2020. As soon as I submitted my review I received a replacement within a week, the rating has changed from 3 to 4 due to the quick reply, I'll see how it works, if there are any problems I'll advise. I use this with my Lenovo desktop computer, before having mouse issues and constant battery changes I was perfectly happy with this keyboard and mouse. Edited on 07/27/2020. I used a spare, this mouse is extremely sensitive, sometimes one click automatically turns into two (2), when I click on a tab to switch from one site to another, instead of opening the site it closes, that often happened once. I tried another USB port, still the same, changed the mouse speed setting on the computer to crawl, nothing changed. Very upset disappointed I bought this product based on the reviews which I think are mostly positive 4 to 5 stars. Rating changed from 4 stars to 1 star, don't waste your money.
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