Logitech K400 Plus TKL Wireless Membrane Keyboard for PC/TV/Laptop/Tablet with Built-in Touchpad Black 920-007119 - Best Buy
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Logitech Unifying receiver - Wikipedia
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Logitech K400 Plus Wireless Touch With Easy Media Control and Built-in Touchpad, HTPC Keyboard for
Amazon.com: New Logitech Unifying USB Receiver for keyboard K230 K250 K270 K320 K340 K350 K750 K800 : Electronics
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
Wireless 2.4G Receiver Computer Keyboard and Mouse Transmitter USB 6 Channel Receiver Dongle Mouse Adapter for Logitech - Walmart.com
Logitech K400 Plus Wireless Touch Keyboard - Newegg.com