Logitech Unifying Receiver 1 to 6 Devices USB Dongle for Wireless Keyboard Mouse 73257010740 | eBay
Logitech Unifying Receiver for Connecting Multiple Devices
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Mini USB Bluetooth 4.0 Dongle - 50m - Bluetooth & Telecom Adapters | StarTech.com
Plugable USB 2.0 Bluetooth® Adapter – Plugable Technologies
The Usb Receiver Adapter Dongle For Hp Wireless Keyboard And Mouse Sk2061 Sm2061 Kbrf7171 K3500 - Pc Hardware Cables & Adapters - AliExpress
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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