Dixon Sustainer Acoustic. The sustainer pickups work as an electro-magnet which allows a musician to sustain a note or a chord for as long as they please. Infinite sustain! Imagine the possiblities when employing a two-handed playing technique. I had to use extra caution when routing for the bridge pickup as it had to be placed (inconveniently) right over the "X-brace" of the guitars top. Heard but not seen: EMG under the saddle transducer pickup.