Logitech K400 specifications
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Logitech Unifying Receiver for Connecting Multiple Devices
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Logitech Wireless Touch Keyboard K400 Plus (920-007119)
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Logitech Unifying receiver - Wikipedia
Logitech Wireless Touch Keyboard K400 Plus (Unboxing) - YouTube
Logitech - K400 Wireless Keyboard w/Nano Unifying Receiver - Unboxing - #133 - YouTube
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Logitech K400 Plus Touchpad Keyboard for TV connected PC
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Wireless Dongle Receiver USB Adapter For Logitech Unifying Mouse MX M905 M510 Keyboard K400R G403 G603 G703 G900 G903 G502 G602
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