Amazon.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
original Logitech MX Master 3S Mouse Anywhere 2S Wireless Bluetooth Office Mouse with Wireless 2.4G Receiver upgrade - AliExpress
Amazon.com: Logitech MX Master 2S Wireless Mouse, Multi-Device, Bluetooth or 2.4GHz Wireless with USB Unifying Receiver, 4000 DPI Any Surface Tracking, 7 Buttons, Fast Rechargeable, Laptop/PC/Mac/iPad - Graphite : Electronics