Logitech Wireless Touch Keyboard K400 Plus (Unboxing) - YouTube
Logitech Unifying receiver - Wikipedia
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For Logitech K800,K750,K710,K700,K520,K400,360 Unifying USB Dongle/Receiver 713929760527 | eBay
Logitech K400 Plus Wireless Keyboard and Touchpad w/ USB Dongle Receiver | eBay
SOLVED: USB for wireless Logitech keyboard lost. - Logitech Harmony Smart Keyboard - iFixit
Amazon.com: Logitech USB Unifying Receiver, 2.4 GHz Wireless Technology, USB Plug Compatible with all Logitech Unifying Devices like Wireless Mouse and Keyboard, PC / Mac / Laptop - Black : Electronics
Amazon.com: Logitech USB Unifying Receiver, 2.4 GHz Wireless Technology, USB Plug Compatible with all Logitech Unifying Devices like Wireless Mouse and Keyboard, PC / Mac / Laptop - Black : Electronics
Logitech K400 Plus did not come with a USB dongle? Wait!! It's hidden in the box!! | THINKBOX
Genuine Logitech USB Dongle Extender for Unifying Receiver | eBay
Logitech Unifying USB Receiver for Wireless Mouse and Keyboard, 6-Device (910-005235) | Quill.com
Logitech K400 Plus Wireless Touch Keyboards
Logitech K400 Plus Touchpad Keyboard for TV connected PC
SOLVED: USB for wireless Logitech keyboard lost. - Logitech Harmony Smart Keyboard - iFixit
Logitech Unifying Receiver for Connecting Multiple Devices
Genuine Logitech Unifying Mirco Dongle Receiver USB For keyboard K400r K400plus | eBay