Amazon.com: Logitech 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
List of Logitech products - Wikipedia
Logitech K350 Wireless Wave Keyboard with Palm Rest
Best Buy: Logitech K350 Ergonomic Full-size Membrane Wireless Keyboard Black 920-001996
Logitech K350 Wireless Wave Keyboard with Unifying Wireless Technology - Black - Walmart.com