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In the middle of the mouse beneath the scroll wheel there's a small Easy Switch button that enables you to readily switch between two computers effortlessly. For instance, if you're likely to use a trackball simply to work on the world wide web and with documents, then just a few additional buttons will be sufficient. Just as the Logitech M570, you will discover a switch button on the bottom side that allows to switch off the mouse when it isn't in use.