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Amazon.com: Original USB Unifying Receiver for Mouse and Keyboard, Unifying Receiver for Up to 6 Devices Support M215 M235 M325 M545 : Electronics
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wake up - Using 2 Logitech unifying receivers lists 2 keyboards and mice in device manager - Super User
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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
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