This inexpensive mouse fits perfectly in my small hand. Works on almost any surface. I LOVE the sleep mode though. I had others I forgot to turn off. It doesn't have a switch that I could find. This is not necessary as the mouse will turn itself off when not in use. Sounds cumbersome, but it isn't. The power button is on the top and easy to reach so I just have to turn it on to use it. When I stop to read or watch something and it goes to sleep, I just press a button in my fingertip and it's ready to go. It's much more convenient than the switch on the bottom and doesn't drain batteries for hours when I'm not using it. Brilliant.
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