Logitech C-U0007 Unifying Receiver ( Lot of 6 ) | eBay
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) | Wish
Logitech Unifying Receiver for Connecting Multiple Devices
Logitech Accessory C-U0007 Unifying Receiver for Mouse and Keyboard Retail - Newegg.com