Wireless Dongle Receiver Unifying Usb Adapter For Log.itech Mouse Keyboard Connect 6 Device For M515 M600 K800 Mk520 K270 Etc - Mice & Keyboards Accessories - AliExpress
Amazon.com: Logitech New Unifying USB Receiver for Mouse Keyboard M515 M570 M600 N305 MK330 MK520 MK710 MK605 : Electronics
Logitech MK520 Wireless Keyboard Mouse Combo with Unifying
Logitech Slim Wireless Keyboard and Mouse Combo - Low Profile Compact Layout, Ultra Quiet Operation, 2.4 GHz USB Receiver with Plug and Play Connectivity, Long Battery Life, Graphite - Walmart.com