The Neo-Buster Humbucking Soundhole Pickup and Feedback Buster from Fishman combines the Neo-D Humbucking pickup with a soundhole cover to provide a rich acoustic tone without worry of feedback. The stacked neodymium magnets produce a warm and full sound while reducing hum and unwanted interference. The pickup provides an ideal string balance with acoustic clarity, while its low-profile, high-impedance design requires no battery and is easily installed without the need for tools. The integrated soundhole cover reduces the build-up of energy inside the guitar that often leads to uncontrollable howling. Made from a flexible elastomer, the pickup will not react with most finishes and will fit most flat-top guitars with a 3-7/8 or 4" diameter soundhole.