Connect your device to a Logitech USB receiver – Logitech Support + Download
How to Connect a Logitech Wireless Mouse to a Unifying Receiver
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Logitech Unifying receiver - Wikipedia
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Logitech Mouse - Pairing with Original Non-Unifying Receiver - YouTube
How to Sync a Logitech Wireless Mouse With a Different Receiver
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How to Sync a Logitech Wireless Mouse With a Different Receiver