Amazon.com: Logitech C-U0007 Unifying Receiver for Mouse and Keyboard Works with Any Logitech Product That Display The Unifying Logo (Orange Star, Connects up to 6 Devices) (C-U0007) : Electronics
Logitech K780 Multi Device Wireless Keyboard Full Size BlackWhite 920 008149 - Office Depot
Logitech Unifying Receiver for Connecting Multiple Devices