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
Logitech Keyboard Dongle
Logitech MX500 Keyboard USB Bluetooth 2.0 EDR Receiver Dongle P/N 830-000021 | eBay
Logi Bolt Wireless Technology - Secure and High Performance
Logitech K380 Multi-Device Bluetooth Keyboard – Windows, Mac, Chrome OS, Android, iPad, iPhone, Apple TV Compatible – with Flow Cross-Computer Control and Easy-Switch up to 3 Devices – Dark Grey Keyboards -