Is there a separate dongle for keyboard and mouse each or does 1 dongle work for both? - Quora
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Solved] Logitech Wireless Mouse Not Working - Driver Easy
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Amazon.com: Logitech USB Unifying Receiver, 2.4 GHz Wireless Technology, USB Plug Compatible with all Logitech Unifying Devices like Wireless Mouse and Keyboard, PC / Mac / Laptop - Black : Electronics