How To Fix Logitech K400r Keyboard (Keys not responding) - YouTube
Amazon.com: Logitech K400 Plus Wireless Touch With Easy Media Control and Built-in Touchpad, HTPC Keyboard for PC-connected TV, Windows, Android, Chrome OS, Laptop, Tablet - Black : Electronics
Windows 10 Help Forums
Amazon.com: Logitech Wireless Touch Keyboard K400 with Built-in Multi-Touch Touchpad, Case of 12 : Electronics