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 German white (Basic guarantee) - iPon - hardware and software news, reviews, webshop, forum
Logitech K400 Plus Touchpad Keyboard for TV connected PC
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
Very short range on logitech wireless keyboard and mouse. : r/htpc