Rockville RDJ2 is a compact 2-channel DJ mixer with a USB port and LED display. It features selectable inputs for each channel, adjustable EQ, and gain controls. The mixer also has a built-in MP3 player with playback controls. Additional features include a microphone input, headphone output, and master volume control.

Here are some possible use cases for the Rockville RDJ2:

• Mixing audio from multiple sources, such as turntables, CD players, or laptops.
• Adjusting the EQ and gain of each channel to create a balanced mix.
• Using the built-in MP3 player to playback tracks from a USB drive.
• Monitoring the mix through headphones or speakers.