as the title says, you should not use it for quality sound the part. But in principle, works quite well. How do I but realized right at the beginning, you should come in no case on the idea to press both buttons simultaneously. For then no one comes out of two more and I had to open as housing and fix with plenty Frickelarbeit the problem. On that occasion, I then made a picture I've attached.
Addendum 06.06.2015: After about half a year, a channel is broken. And I do not think it's a coincidence, so that I accidentally caught a bad device. Although it took only 10 ... who have not paid off.
