The Akiyama DJ-1200 USB is a high-performance DJ mixer designed for digital DJing applications. It features a dual USB connection for two DJs to play back-to-back with four decks available for each DJ separately. The mixer also contains various features to enhance the user experience, such as high-quality Audio FX, Beat Sync function, and more. The USB connectivity allows for direct playback of music from a computer or a USB drive, as well as recording and saving mixes directly to the connected computer. Additionally, the mixer has various input/output options, including RCA, XLR, and BNC outputs, as well as mic and headphones jacks. Overall, the Akiyama DJ-1200 USB is an excellent choice for professional DJs looking for a reliable and feature-packed mixer for digital DJing performances.