New Usb Receiver Wireless Dongle Receiver Usb Adapter For Logitech Mk270/mk260/mk220/mk345/mk240/m275/m210/m212/m150 Mouse Keybo - Mice & Keyboards Accessories - AliExpress
USB dongle receiver for PERIDUO-707-plus-black – Perixx USA
Amazon.com: Logitech Wireless Keyboard and Wireless Mouse Combo with NEW Unifiying Receiver Technology and Long-Range 2.4 GHz Connection, Multimedia Hot Keys, Extended Battery Life : Electronics
non unifiying dongle replacement : r/logitech
Logitech Unifying Receiver for Connecting Multiple Devices
Logitech Mk320 Usb Receiver
Amazon.com: Logitech Mk220 Wireless Keyboard And Mouse Combo Black