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Logitech Wireless Touch Keyboard K400 Plus review: Logitech's $40 K400 Plus spruces up the couch-potato experience - CNET
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Amazon.com: Logitech Wireless Touch Keyboard K400 with Built-In Multi-Touch Touchpad : Everything Else
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Amazon.com: Logitech K400 Plus Keyboard - Wireless Connectivity - RF - Black - USB Interface - Italian : Electronics
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