Logitech K380 vs Logitech K400 Plus Side-by-Side Keyboard Comparison - RTINGS.com
Refurbished: Logitech Recertified 920-003070 K400 Wireless Touch Keyboard with Built-In Touchpad for Internet Connected TV's - Newegg.com
Amazon.com: Logitech K400 Plus Wireless Touch TV Keyboard With Easy Media Control and Built-in Touchpad, HTPC Keyboard for PC-connected TV, Windows, Android, Chrome OS, Laptop, Tablet - Black : Electronics
LOGITECH K400 PLUS 920-007119
Logitech K400 Plus Touchpad Keyboard for TV connected PC