The Overture picks up the warmth and character of your instrument with startling clarity and accuracy, preserving its natural acoustic sound for live performance and direct-recording applications. The ceramic accelerometer is a very small and light device that is mounted to your guitars top and senses the complex vibrations of your guitar. Combined with our preamp, which is slightly larger than a 9-volt battery, get excellent dynamics and a very wide frequency response. This is a great pickup for percussive players and it works well for steel or nylon string instruments. (Previously known as the "Perfect Timbre"