How To Fix Logitech K400r Keyboard (Keys not responding) - YouTube
Logitech Wireless Touch Keyboard K400 with Built-In Multi-Touch Touchpad, Black - Walmart.com
Logitech K400 Plus did not come with a USB dongle? Wait!! It's hidden in the box!! | THINKBOX
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