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Use the version that came with the mouse.
Sorry, there was a problem. Please try again later.Hi! The Logitech M575 and MK520 are both Unifying devices and can be used with the same Unifying receiver. You can check this link to determine the type of device you have and the receiver it uses: https://prosupport.logi.com/hc/articles/4407041174167-How-do-I-know-if-my-device-is-Logitech-Unifying-or-Logi-Bolt
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