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
Logitech K400 Plus Touchpad Keyboard for TV connected PC
Logitech K400R Wireless Touch Keyboard with Touchpad (NO RECEIVER) (FRENCH CHARACTERS)
Amazon.com: Logitech Unifying Receiver USB Dongle for Logitech M185 Wireless Mouse and Keyboard : Electronics
Original Logitech Keyboard K400r K400plus Unifying Mirco Dongle Receiver USB | eBay
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
Short review: Logitech K400r vs Plexgear Mediatrack Ergo - Erik Moberg's personal homepage - photography, gadgets, DIY, and more
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Logitech K400 Plus Touchpad Keyboard for TV connected PC
Amazon.com: SummitLink Unifying Receiver for Mouse and Keyboard Compatible for Any Logitech Product That Display The Unifying Logo (Orange Star, Connects up to 6 Devices) B083J7DYDT : Electronics
Original Logitech Keyboard K400r K400plus Unifying Mirco Dongle Receiver USB | eBay