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Amazon.com: Universal Pairing USB Receiver Replacement for Dell Wireless Keyboard Mouse KM714 KM717 : Electronics
Logitech Unifying receiver - Wikipedia
Amazon.com: Logitech 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