They say the sound is low, but the sound was great with the combination of the pad and AirPods. It was a long time ago, so the Eclipse, Tomcat, and Oracle versions were different, so there were many errors during the development environment setup and the actual class, so it took a lot of time to adjust, but thanks to this, I learned about the versions, so I think it was helpful. Since it was an old class, the errors I was experiencing were things that other students had already experienced, so I got a lot of help from the Q&A posts to fix the errors. I think this class is a great deal at this price.