logitech K400 Wireless Touch Keyboard User Guide - Manuals+
Logitech K400 Plus Review - RTINGS.com
User manual Logitech K400 Plus (English - 2 pages)
Logitech K400 Plus Wireless Touch Keyboard with Touchpad for PC connected TVs 97855115300 | eBay
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, QWERTY UK English Layout - Black : Amazon.co.uk: