How To Fix Logitech K400r Keyboard (Keys not responding) - YouTube
logitech K400 Wireless Touch Keyboard User Guide - Manuals+
Is there an iPad keyboard and trackpad combo that isn't a case? : r/ipad
logitech K400 Wireless Touch Keyboard User Guide - Manuals+
Logitech Wireless Touch Keyboard K400 Plus with Built In Touchpad for Internet Connected TVs|wireless touch keyboard|touch keyboardlogitech wireless touch keyboard - AliExpress