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 : Amazon.co.uk: Computers & Accessories
Logi Bolt USB Receiver for Multi-Computer / Device Use
Logitech USB Unifying Receiver - Black : Amazon.co.uk: Computers & Accessories