Logitech K520 Wireless Keyboard Unifying (NO USB RECEIVER) 97855066718 | eBay
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
Logitech K520 Wireless Keyboard With Unifying Receiver Dongle! | eBay