This small Bluetooth adapter is very convenient! On my "old" laptop, I unfortunately do not have bluetooth and I recently bought a mouse with this technology, so I had to look for an adapter. This is one of the best value / price, installation is very simple, takes just a few clicks and allows to use any Bluetooth accessory. you can connect and disconnect without problem, it will be recognized immediately, without having to reinstall or otherwise. It is also very small, so take care not to lose ... But given its size, it can be quite leave it plugged all the time at his laptop and store it in the pouch, no difference in size.