Pickup and preamp for steel string guitar. Nanoflex pickups not only respond to string vibrations, but also sense the vibrations of the body of the instrument simultaneously. This completed shielded system incorporates active amplification in the pickup itself, which makes it 100% hum and noise free. The SH MS NFX-V is an easy-to-install pickup system that houses its preamp elegantly in the endpin jack, which means no cutting into the side of the guitar. The volume control is mounted discreetly inside the sound hole along with the 9V battery pack/holder. Features: Volume control, Endpin preamp, Easy installation, Battery holder included, 9V battery included