Original Logitech Keyboard K400r K400plus Unifying Mirco Dongle Receiver USB | eBay
Logitech Unifying receiver - Wikipedia
Genuine Logitech Unifying Mirco Dongle Receiver USB For keyboard K400r K400plus | eBay
I'm sick of old stuff you can't but anymore on this sub! I bought this Logitech k400r about 10 years ago and no matter how much I abuse and/or neglect it, it
Logitech K400 Plus Touchpad Keyboard for TV connected PC
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Logitech K400 Plus Review - RTINGS.com
Getting started with Logitech® Wireless Touch Keyboard K400