Logitech K800 Wireless Illuminated Keyboard Backlit Fast Charging 2.4 GHz Connection Unifying Receiver Black - Office Depot
Logitech MK710 Wireless Keyboard and Mouse Model YR0059 + UNIFYING RECEIVER | eBay
Amazon.com: Logitech K350 Wave Ergonomic Keyboard with Unifying Wireless Technology - Black : Electronics
Amazon.com: Logitech K750 Wireless Solar Keyboard for Windows, 2.4GHz Wireless with USB Unifying Receiver, Ultra-Thin, Compatible with PC, Laptop - Black : Electronics
What is Unifying? - Logitech
Logitech MK365 Keyboard and Mouse Combo 2.4GHz 1000DPI Unifying Receiver USB RF Wireless Ergonomical -Black,Black/Red,Black/Silver Keyboards - Newegg.com