This electrostatic bridge-mounted transducer provides an amazingly natural sound for bass. Leave it to the Swiss to bring this quality of non-piezo sound into a reasonable price range. Includes a preamp with volume control and 1/4 inch output. Use the STAT-B instead of the Schertler DYN-B if you play in high amplification volume settings. The Schertler STAT-B requires a bit of simple fitting of the cork to fit into your bridge with sandpaper or a utility knife - a relatively easy procedure! And removes without a trace when you need to play acoustically.