This is a set of Pioneer DJ mixer DJM-450 and two CDJ-850s. They are in good working order and fully functional. Both CDJs have no issues with CD reading, USB reading, and the operation of various buttons and knobs. The DJM-450 has had its product registration cancelled. You can use rekordbox DVS for free simply by connecting it to your PC via USB. (Also, if you search for "rekordbox control signal," you can download the control signal audio for free from the Pioneer website. By putting this audio data on a USB and reading it with the CDJs, you can DJ with your favorite tracks on your PC, and of course, it supports Apple Music and Spotify.) The faders are Magvel faders, so they operate very smoothly, and the operation of various buttons is also problem-free. It has many built-in effects, and you can play analog records with very high sound quality, comparable to the sound quality of Pioneer's high-end DJM-900NXS2 class models. It will be shipped in three packages via Yamato Transport. Thank you.