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Logitech Wireless Touch Keyboard K400 Plus review: Logitech's $40 K400 Plus spruces up the couch-potato experience - CNET
Logitech K400 Plus Touchpad Wireless Keyboard Black - Usb Wireless Connectivity - On/off Power Switch - 2.40 Ghz Operating Frequency : Target
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Logitech Wireless Touch Keyboard K400 Plus Cz | Logitech Keyboard Unifying Receiver - Keyboards - Aliexpress
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