Logitech Wireless Keyboard/Mouse USB Receiver 2.0 EDR C-UV35 | eBay
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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
Amazon.com: Logitech MX Ergo Wireless Trackball Mouse, Bluetooth or 2.4GHz with Unifying USB-Receiver, Adjustable Trackball Angle, Precision Scroll-Wheel, USB-C Charging Battery, PC/Mac/iPad OS - Black : Electronics
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