Looking for a pickup for your acoustic guitar that sounds great, is easy to install, and can be removed just as easily? Check out the Seymour Duncan Active Mag soundhole pickup. Made for soundholes 3.75"–4.2" in diameter, the Active Mag can either be permanently installed or temporarily mounted. It's powered with two small batteries (no 9-volt required), providing up to 160 hours of performance. Adjustable pole pieces for each string, perfect for fine-tuning its sound for any guitar. And thanks to its stacked design, the Seymour Duncan Active Mag soundhole pickup has an ultra-low noise floor with impressive headroom.