For contact, I just bought it and by God it's great. I sold it because I needed the profit, and there's proof that I just bought it. { The specifications include a loud and soft sound, there's very loud, very soft, medium loud, medium soft, and also a very strong echo. You can search for the mixer on social media and it will appear. You can play songs and other things through Bluetooth. { You can connect it to PS4, PS5, and PC as well. {