Logitech K400r Wireless Keyboard With Touchpad & Unifying USB Receiver - Tested | eBay
keyboard - How To Replace Logitech Wireless Unified USB Plug In Ubuntu - Ask Ubuntu
keyboard - How To Replace Logitech Wireless Unified USB Plug In Ubuntu - Ask Ubuntu
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