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 Usb Unifying Receiver - Wireless Dongle Receiver Usb Adapter 6 M905 - Aliexpress
Logitech K400 Plus keyboard RF Wireless Y-R0055 NO DONGLE NOP BATTRIES 97855115300 | eBay
Logitech K380 Multi-Device Bluetooth Keyboard (Dark Gray) Bundle with Knox Gear USB Bluetooth 4.0 Dongle Adapter (2 Items)
Logitech K400 Usb Unifying Receiver - Wireless Dongle Receiver Usb Adapter 6 M905 - Aliexpress
Logitech K400 Plus Wireless Touch TV Keyboard With Easy Media Control and Built-in Touchpad, HTPC Keyboard for PC-connected TV, Windows, Android, Chrome OS, Laptop, Tablet - Black - Newegg.com
Genuine Logitech USB Dongle Extender for Unifying Receiver | eBay
Logitech K400 Plus Wireless Touch Keyboard - Newegg.com
Wireless Usb Receiver Dongle 6 Channels Adapter For Logitech Unifying Keyboard K400/mouse Mx M905 M510 Repair Replacement - Instrument Parts & Accessories - AliExpress
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