MSI Star Key Bluetooth USB Dongle Adapter - Wireless Connectivity for PC, Laptop, Keyboard & Mouse - Perfect for Home Office, Gaming & Remote Work

This worked with some of my gadgets some of the time. The drivers were a pain to install. I could also never get it to work without it's own program. It would be easy to think it works well if you have never tried anything else and you have compatible hardware. I got a much, much smaller dongle for around $2 that works better and does not require a driver (it is a windows supplied driver)