The Radial Engineering PRO DI is a passive direct box designed for professional audio applications. It features a high-performance transformer for optimal signal transfer and a rugged construction for durability. The PRO DI is part of Radial's line of high-quality pro audio equipment and is suitable for use with musical instruments and gear.
This unit is in excellent condition, I bought it as a demo years ago, and have never had the chance to actually use it. See photos.