Barcus Berry Outsider Piezo Transducer 1457 Piezo Tranducer Perfect for recording, broadcast or live performances where its high-level output and feedback rejection are most needed. Mounts on top of the guitar adjacent to the bridge. For use with virtually any flat top or arch top guitar. Installation requires no tools nor alterations to the instrument, incl. mounting strips, ideal for Balalaika, Berimbau, Drums, Guitar, Guitarron, Kalimba, Koto, Lute, Sitar, Steel Drum, Ukulele, Zither, Tap Floor, Any Wooden Instrument