Logitech Wireless Touch Keyboard K400 Plus (Unboxing) - YouTube
Logitech Unifying Receiver for Connecting Multiple Devices
Logitech K400 Wireless Plus TV keyboard with touchpad, 2.4 GHz connection via USB Unifying receiver, programmable multimedia keys, Windows / Android / ChromeOS, Scandinavian QWERTY layout - White: Amazon.de: PC & Video Games
Original 3mm Unifying Receiver For Wireless Mouse And Keyboardconnect Up To Six Devices - Buy 3mm Logitech Unifying Receiver,Mini Receiver Product on Alibaba.com
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
LUN Wireless Dongle Receiver USB Adapter for logitech Mouse Keyboard M905 M950 M505 | Shopee Brasil
Updating Logitech Hardware on Linux – Technical Blog of Richard Hughes
Logitech K400 Plus Black Wireless Touch Keyboard | Peripherals | Computers and Gadgets | Abenson.com
List of Logitech products - Wikipedia
Logitech K400 Wireless Touch Keyboard Unifying Receiver Touch Pad Mouse for PC Laptop free shipping wholesal # 140016 - AliExpress Computer & Office
Amazon.com: Logitech USB Unifying Receiver - 2 Pack : Electronics
Logitech K400 Plus Touchpad Keyboard for TV connected PC