How to pair more than one device with a Logitech receiver
Logitech K350 Wireless Wave Keyboard with Palm Rest
Amazon.com: Logitech MK540 Advanced Wireless Keyboard & Mouse Combo Travel Home Office Modern Bundle with Boost Water-Resistant Portable Wireless Bluetooth Speaker, Gel Wrist Pad, & Gel Mouse Pad : Electronics
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How to Pair a Logitech Keyboard
Turn on your MK540 keyboard and mouse. To connect the MK540 mouse and keyboard, plug the provided Unifying receiver into a USB
Logitech K350 Wireless Wave Keyboard with Palm Rest