The KNA AP-2 Acoustic Instrument Pickup is a great choice for musicians craving the natural sound of their acoustic instrument without a lot of setup. A wood-encased piezo sensor is mounted to a projecting surface of an instrument using a reusable putty. After installation, control the level of the signal with the included volume pot. Oxygen Music stocks a range of pickups and accessories including the AP-2 acoustic instrument pickup from KNA.