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
Logitech K400 Plus Wireless Touch Keyboard with Built-In Touchpad for Internet-Connected TVs
What devices can I pair with my Logitech unifying receiver, other than a mouse and keyboard? - Quora
Logitech K400 Plus 99 New Wireless Touch Keyboard With Touchpad 2.4ghz Unifying Receiver Wireless Keypad For Pc Laptop Android - Keyboard Mouse Combos - AliExpress
Connecting a Logitech device to your Unifying Receiver (Windows and Mac) - YouTube
Amazon.com: Logitech 920003051 K270 Wireless Keyboard, USB Unifying Receiver, Black : 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
Logitech Wireless Touch Keyboard K400 Plus review: Logitech's $40 K400 Plus spruces up the couch-potato experience - CNET
Solved] Need a usb-wifi dongle for Logitech k400 Plus - Debian User Forums
How To Pair Logitech Unifying Receiver With Mouse And Keyboard | Logitech | Get Fixed - YouTube