Logitech MK330 Wireless Keyboard and Mouse Combo for Windows, 2.4 GHz Wireless with USB-Receiver, Portable Mouse, Multimedia Keys, Long Battery Life for PC/Laptop, QWERTY UK Layout, Black - DigiDirect -
Amazon.com: Wireless Combo MK330 USB : Electronics
New Wireless Receiver for Logitech Mouse M905 M345 M325 M310 T620 T400 USB Dongle for MK710 MK520 MK330 MK270 Mouses Keyboard - AliExpress
6 Channel Unifying USB Wireless Receiver Dongle for Logitech Mouse Keyboard M215 M235 M325 M545 M705 etc - Newegg.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 - Amazon.com