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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 - Amazon.com
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Logitech 920-002553 MK520 2.4Ghz Wireless High-performance laser upto 3 years battery life Unifying receiver Keyboard & Mouse combo - Walmart.com
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