This banjo pickup features a very effective three dimensional vibration sensor molded into a high quality 5/8" tall ebony-capped maple 5-string bridge. The pickup does not diminish the acoustic sound. Includes a 1/4" jack with special hardware that allows you to attach the jack to the tensions hooks for a very secure fit. Great for either resonator banjos or open-back banjos. This is a passive system, so preamplification is recommended.