The Fishman Neo-Buster Humbucking Soundhole Pickup produces a warm and full sound with reduced hum and unwanted interference for a high quality performance. The Neo-Busters integrated feedback-buster reduces the noise produced in high-volume situations so you can play as loud as you want and still produce a high-quality sound. The Neo-Buster Humbucking Soundhole pickup features a neodymium magnet for exceptional string balance and superior clarity. The pickups low-profile design allows it to run without a battery or power supply.