Why you should really, really update your Logitech wireless dongle - The Verge
Wireless Keyboard K340
Logitech New Unifying USB Receiver for Mouse Keyboard M515 M570 M600 N305 MK330 MK520 MK710 MK605 - Walmart.com
Wireless Keyboard K340
Logitech MK540 Advanced Wireless Keyboard & Mouse Combo Travel Home Office Modern Bundle with Boost Glow in the Dark Water-Resistant Portable Wireless Bluetooth Speaker, Gel Wrist & Mouse Pads - Newegg.com