After a few disappointing experiences I have decided for this cheap in every sense dongle. The current Bluetooth standards, the price and the class 1 with good coverage are united here. In the first test is very quick installation on Win7 and immediate strong connection to a Bluetooth partners showed. I stream music to my amplifier. Here I was, unlike other dongle's immediately and permanently connect. which is also less than ideal conditions. During the session WIN7 I can change the default audio output device without rebooting. I run the dongle to the notebook and use the connection to the cabinet internal Bluetooth partner.