Logitech K400 Plus Keyboard Setup & Review - YouTube
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User manual Logitech K400 Plus (English - 2 pages)
Logitech K400 Plus Review - RTINGS.com
Amazon.com: Logitech Wireless Touch Keyboard K400 Plus Keyboard with 3.5-inch Multi-touch Touchpad, Quiet Keys, Wireless Keyboard up to 33 ft. Plug-and-Play (Renewed) : Electronics
Logitech K400 Plus Review - RTINGS.com
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User manual Logitech K400 Plus (English - 2 pages)