The Pioneer DJ DDJ-WeGO4 is an entry-level DJ controller designed for use with the popular DJ software, Serato DJ. It features two decks, four-channel mixing, and a built-in sound card. It also includes a variety of performance pads, knobs, and faders, as well as a built-in sampler and effects. It is designed to be both user-friendly and portable, making it ideal for beginner DJs and those who want to take their setup on the go.