The Schatten UST-1 Active with Volume and Tone Controls is a high quality, coaxial element undersaddle pickup system designed for steel and nylon string acoustic guitars. The UST-1 pickup sensor is more than 3 inches long, and can be used with any string spacing. The UST-1 pickup sensor is not string position dependent and will provide proper string balance regardless of the string spacing. The unique polymer cable piezo element that detects vibrations from all directions and provides a full, rich tone. The UST-1 Active is an active pickup pickup system that includes a high quality, low noise preamp built into the endpin jack. You can plug this pickup into any amplifier, mixer board or PA system directly. This system includes soundhole mounted volume and tone controls for immediate, on-stage adjustments.