I have found this mini bluetooth dongle. It works and is very small. I found it particularly helpful for my laptop as it doesn't stick out and get knocked or damaged. It has a flush rounded fit so I can leave it in all the time. It has free delivery too so won't cost anything extra. I've used it for many things now including pairing my mobile. Theres even a link for a driver, although it's plug and play and my laptop installed the software automatically.