Amazon.com: Logitech USB 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 MK270 Reliable Wireless Keyboard and Mouse Combo
Logitech Wireless Keyboard and Mouse Combo MK270 - 2.4GHz, Unifying Nano Receiver, Extended Battery Life
Free Shipping Original New Mouse And Keyboard Receiver For Logitech Mk270/mk260/mk220/mk240/mk345 - Mouse - AliExpress
Amazon.com: Logitech USB 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
What devices can I pair with my Logitech unifying receiver, other than a mouse and keyboard? - Quora
Logitech MK270 Reliable Wireless Keyboard and Mouse Combo