It surprised me very much that I have to write a negative with so many very positive reviews now. I am completely disappointed by this unit from start to finish! The very first use brought with it many problems. The otherwise so exemplary prompt with USB drivers Windows 7 took first place, no driver. Had I but made very suspicious the whole thing. After restarting the PC and a training and insertion of sticks, but a driver could be found. Phew, I thought, but was right back negative surprises when my unsuccessful search for my phone. Then I the stick off again and plugged - whoosh! - Cell found. But the series did not want to leave, because the phone lies not connect. Also, all my other Bluetooth devices that worked properly otherwise, could not be used on this stick. Very annoying! The hope everything would work out in the end, but I did not recite and thus sought and I found the oficial driver connected to the program BlueSoleil. But made it worse! After installing this driver / program I suddenly had no access to my other USB devices ... how could this happen? Apparently seemed the normal Windows USB driver to have been overwritten, so I had my work cut to be turned off again. I was really having to verge neuaufspielen my system, as this issue as well as not read solving. The hope that the Bluetooth devices would then fold, faded. Also other tips and tricks on how different settings on one side of the Windows service for Bluetooth, as on the other side of the device using the Windows driver (I could, as I said, recover after a tough battle) appeared, not to be working for me. And so I left after 2 months of tireless trying my hand, only to surrender and the trouble! Even if it may be little money to get into a situation in which his system you have to play again due to a not even 2MB driver / program, is simply beautiful ****. And I tell the time now so hard, because I'm sure that a normal Windows users would have not have got done with the driver without reinstalling Windows.