Sigh. Ive had the second mouse for about 20 months and its been getting progressively harder to work the middle click for the last three or four, so Im contacting Logitech for a refund/replacement again - its got a three-year warranty, so I hope they wont give me any hassle. This is by far the best keyboard I have ever owned, as every key is amazingly satisfying to click, without a ludicrous asking price, as I think you get your moneys worth. Which is interesting since in the brown the ONLY size you can order is 14. Fits all of our shoes in the cupboard section, keys/dog leash in the drawer and looks better than the cheapo bookshelf we used to use in the same spot. Maybe I just need to wear them a little longer, but I can work for 5hrs or so and when I wear these, my feet are still really sore at the end of my shift. Would easily buy these again. Terrible customer service. I was just looking for something ASAP to protect her airpods, which she saved up for. Essentially, each earbud outputs a signal and when you connect to one, it automatically syncs with the other earbud.