The AlphaTheta DDJ-FLX2 + Pioneer DJ HDJ-CUE1 is a starter set that allows you to get started quickly. You install a DJ program like Rekordbox to start mixing right away. In most DJ programs, you can find streaming services from which you can use songs for mixing. With 1 button, you can mix songs like a professional. This way, you can let 2 songs flow smoothly into each other or emphasize a part of the song. You can listen to what you're mixing with the headphones. So you can prepare your mix before the audience hears it. The headphones have a 5 to 30,000Hz frequency range, so you can hear detailed sound. This way, you can listen critically to what you're mixing.