There is a major problem with the M510 mouse included in this kit. If there is no activity for it for about 5 seconds, then it goes to sleep and moving the mouse in a normal way doesn't do anything. The mouse only wakes up if a button is clicked or if the mouse is moved back and forth over a large area. From researching this issue, apparently this is a feature (or problem) with a newer design of the M510 mouse to conserve power as older models did not have this behavior. I can see the point of putting the mouse in a sleep mode after a couple minutes, but not after 5 seconds. I am trying to get support from Logitech regarding this mouse issue, but their support site doesn't recognize this MK530 product by serial number or by the MK530 model. So there's no way to register it. They have MK520 listed as a supported product, but not MK530. I've also tried to register the M510 mouse's serial number, but it's also not recognized by Logitech's support site. So I'm not sure how I can get warranty support for this. Didn't have any issues using the keyboard so far, but I would never have bought this kit in the first place if I knew the included mouse had the sleep issue.

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