Logitech Wireless Touch Keyboard K400 Plus review: Logitech's $40 K400 Plus spruces up the couch-potato experience - CNET
Logitech Wireless Touch Keyboard k400 Review | Digital Trends
Logitech Keyboard K400 Software And Driver Setup Install Download
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
Logitech K400 Plus Touchpad Keyboard for TV connected PC