Gemini CDJ set. Two units. I bought these for DJ practice and used them, but they've been stored for over 5 years. When I was using them, I played around with USB, CD, and MIDI control for practice. Please refer to the images for the product specifications. As of today, I've confirmed the following: * Power turns on. * As shown in the photos, both units can read and play USB (MP3 format). They also read the song waveforms. * They responded in vinyl mode. * CD operation has not been confirmed. * I haven't connected them to a mixer, amplifier, or speakers, so I haven't tested the sound output. * The JOG dials are rubbery, so they're a bit sticky. They might be fixed by wiping them. ※ Thank you for your interest, as indicated by your "like." I haven't confirmed CD reading or sound output, but I plan to test them when I have time. I may consider raising the price after those tests, so please keep that in mind. Thank you.