DB-1 is a passive single channel direct box. It converts your HI-Z signal to LO-Z XLR. You do not need a battery or phantom power for this direct box.DB-1 is one of the most useful and versatile tools available indispensable in enabling easy interfacing and connection between various audio gear in numerous applications.Great for Keyboardists, Acoustic & Electric Guitarists, Bassists, and other instrumentalists needing to plug into the snake on stage. Ground lift switch and 2 levels of padding.