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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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Logitech K400 Plus Black Wireless Touch Keyboard | Peripherals | Computers and Gadgets | Abenson.com
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Amazon.co.jp: Logitech Wireless Touch Keyboard K400 with Built-In Multi-Touch Touchpad, Black 並行輸入 : パソコン・周辺機器
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