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) : Electronics
Logitech Unifying Receiver for Connecting Multiple Devices
Logitech MK520 Wireless Combo 920-002553 B&H Photo Video
Logitech K520 Wireless Keyboard (NO RECEIVER) 97855066718 | eBay
Logitech Unifying Receiver for Connecting Multiple Devices
Logitech MK520 Wireless Keyboard Mouse Combo with Unifying
Amazon.com: Logitech New Unifying USB Receiver for Mouse Keyboard M515 M570 M600 N305 MK330 MK520 MK710 MK605 : Electronics
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 MK520 Wireless Keyboard Mouse Combo with Unifying
Logitech K520 wireless keyboard (no USB receiver Or Mouse) | eBay
Logitech Unifying Receiver for Connecting Multiple Devices